David Berlind points out the should-be-obvious (but-not-very-remarked) : Google's Chrome + Gears also wraps mobile (device swarm) operating systems.

Point 1 : the browser is the only reliable application container which runs reliably across different operating systems on phones

Point 2 : the downside of the browser is that it depends on network connection which is unreliable on mobile phones

Point 3 : Gears (which is sneaked into Chrome) solves that.