It's happened already: https://earth.google.com is a Flutter app that's entirely drawn in a canvas. Its accessibility sucks. Things that you use to be able to copy and paste like names of places or phone numbers etc you no longer can. It's horrifying. Accessibility or translation extensions have nothing to look at.

It's also the new flash since like flash it's just a bucket of pixels. Like when say VisionOS comes out and their browser has made tweaks to all the HTML form elements so they work well with finger gestures in the air but of course here this page is just a block of pixels so it will have the wrong interface for the device.