THE VISION PRO’S FIRST KILLER APP IS THE WEB, WHETHER APPLE LIKES IT OR NOT

Summary from the TLDR Design newsletter

There aren’t many native apps for the Vision Pro headset yet, so Apple will need Safari to work well on it to make the headset a success. The browser will come with some platform-specific features, such as the ability to open multiple windows simultaneously and move them around in virtual space and support for WebXR, which could enable more immersive web experiences.