It looks real slick, but there is one note-worthy bit:
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.
I'm not a fan of web-apps generally, but the transparency sure is pretty! @o@
Wasn’t that the approach of Firefox OS? Not sure how successful this will be but I’m glad somebody is trying it. If webapps were a bit more ubiquitous, I could see this being a good alternative to something like ChromeOS