Good technology stops looking like technology and becomes the environment. Electricity did it. The internet did it. AI is now doing the same. We unpack this principle slowly through Apple's Liquid Glass announcement at WWDC 2025.
If you've been using AI for a year or two, you've probably felt something strange. You still have to open a separate app to use it. You're writing an email, you switch to ChatGPT, you ask, you copy the answer back, you switch windows again. It's not smooth. And there's a reason for the friction. AI is still a guest, not the environment.
Here's today's principle. Good technology stops looking like technology and becomes the background. This essay walks through why AI is moving from being an 'app' to being 'wallpaper,' and where that shift is already visible. I'll use Apple's WWDC 2025 announcements as examples, but examples age fast. Principles don't. We'll go slowly.
Let's start with the principle. When a new technology first arrives, we attach its name to everything. When electricity first came to homes, people said 'electric light.' They bolted the word electricity onto the word light. When the internet first spread, we said 'internet newspaper,' 'internet shopping.' Today we just say news, just say shopping. The word internet fell off.
Why? Because the technology became the environment. Air doesn't need a label.
The same thing is happening to AI. Right now we say 'AI chatbot,' 'AI translation,' 'AI coding.' In three years we'll just say chat, translate, code. And the shift will arrive in a specific form — the app itself will disappear. That's today's core point.
People are using AI the hard way right now. It's like walking to a drawer, opening it, taking something out, using it, putting it back. Open chat window, type question, copy answer, paste into original window, close chat window. Dozens of times a day.
This isn't AI's fault. It's because AI is still inside the toolbox. The internet went through the same phase. Turn on a modem, open a dedicated app called a browser, shut it all down when finished. Into the early 2000s, "let's go online" was a natural sentence. Today that phrasing sounds odd. We don't go to the internet; we live inside it.
AI is one step behind on the same path.
Let's look at where the shift is already visible. In June 2025, Apple unveiled a new UI concept at WWDC called Liquid Glass. The name says it — liquid glass. UI elements look like transparent glass floating on the screen.
Many people stopped at "that's pretty." But it wasn't made to be pretty. It was designed to dissolve the boundary between physical and digital space. That's why Apple made its biggest UI change in 10 years.
At the same event Apple also showed CarPlay Ultra. Today's CarPlay handles the center screen — navigation, basically. CarPlay Ultra takes over the entire car OS — dashboard, tire pressure, speedometer. Auto companies are already cooperating.
They also showed a 3D feature. An image that looks like a photo on a webpage turns into a 3D space with actual depth when you move your head. It works because an AI turns a single photo into 3D content.
See the common thread? None of these three say "open an app." They're already on the screen, already in the car, already on the webpage. The user never launches anything. That's the point.
Think of two things inside a house. Windows and wallpaper.
Windows are made to be looked at. They should stand out. They have frames, they open and close, and you need to know "there's a window over there." Today's ChatGPT app, Claude app — those are windows. Visible. Open and close.
Wallpaper is the opposite. It does its job when you don't notice it. If a guest enters and says "nice wallpaper," the wallpaper has slightly failed. It stuck out too much. Good wallpaper creates the mood of the room but isn't visible on its own.
AI is a window today. AI becomes wallpaper tomorrow. Open your email app and AI is already there. Pick a photo and AI is already there. Get in a car and AI is already there. The gesture of "turning on the AI" disappears.
Apple has six device categories in play: iPhone, iPad, MacBook, Apple Watch, Vision Pro, and now CarPlay. A single UI concept — Liquid Glass — is being applied consistently across all six. That's the spine of the announcement.
Here it is as a table.
| Era | Input | Where AI sits |
|---|---|---|
| Desktop era | Keyboard + mouse | A separate program |
| Smartphone era | Touch | A separate app |
| Spatial computing era | Gaze + gesture + voice | The whole environment |
Three rows, 30 years of change. Here's the aha moment.
AI is moving from being 'one app' to being 'the background of every app.'
If you make products, change your question. Not "where do we add an AI feature to our product?" Instead: "when does the user benefit from AI without noticing?"
Those two questions produce completely different answers. The first one usually ends with a new chat window. The second hides AI behind existing elements — the search bar, the title field, the upload button.
Take a blog management tool.
Both use the same AI. Completely different user experience. The second one is wallpaper. The second one lasts.
You don't need Apple hardware to practice this feeling. In your current Chrome browser, try this URL.
https://www.google.com/search?q=your+question&udm=50
udm=50 is the parameter that turns on AI Mode. Same search bar, but the answer comes back as AI prose. The user doesn't think "I'm using AI." They just searched. That's a small example of wallpaper design.
If you're on macOS 26, open the Notes app, select any text, right-click. You'll already see 'Summarize' and 'Rewrite' in the menu. The Notes app is the window; AI is the wallpaper underneath.
Let's wrap up.
Good technology disappears. Electricity disappeared. The internet disappeared. Now AI is starting to disappear. Disappearing doesn't mean dying. It means being everywhere, so we no longer need to name it.
Apple's Liquid Glass, CarPlay Ultra, and Vision Pro 3D web are just examples. Next year another company will ship something similar under another name. In three years the words 'Liquid Glass' may be forgotten. But the direction — AI moving from app to environment — won't change.
Makers, recalibrate with this direction. Don't ask "where should we put the chatbot?" Ask "where should we hide the AI?" Hidden feels natural. Natural lasts.
Technology changes. Principles don't.
Less window. More wallpaper. The environment wins.