This looks really promising.
Does Kera Desktop only support web apps?
For now, yes. Support for Linux apps is perfectly possible and on the roadmap. For other platforms, we will see what’s possible.
This is a non-starter for me. It makes it less useful than ChromeOS. But, once it runs regular apps, I'd love to give it a try.
I think it looks really nice, and the various approaches it uses are very nice.