Both your snippets works on Android too under FireFox & Opera, with Opera having the edge.
The skinned mesh is obviously too much for my paltry phone gpu :/ but particles runs at a good frame rate.
They run on Web TV too.

I've been following the W3C & Khronos groups: Mozilla, Google and Apple are all pushing new standards, so it's just a matter of time I guess until the missing bits for game-oriented usage become widely available (full-screen, mouse-capture, audio API etc.).

Once/if Apple enables WebGL in iOS 6 for widespread usage, that could be a game changer, so to speak.