It's really great to see that Android (and Firefox OS obviously) is going this way. Maybe soon we can forget the native apps (that remind me of the multimedia CD ROM era from 1995) for a lot of apps that do not need access to the system's API.
Until then, I'll keep my native apps thank you very much.
(And I didn't even start on Javascript, because you can transpile. But the itch is present :^))
I was gung-ho on the mobile web as app platform and was sure that it would beat out native on mobile as it did on the desktop, but the situation is different. Web apps have a worse install experience on mobile, taking away much of the reason to build for the web, and because there can't be competing browsers there is no competition between browser makers to improve the mobile web, keeping it in a pretty lousy place.