The platforms we can potentially make HTML5 wrappers for are:
There's also anything PhoneGap Build supports which includes Windows Phone 7, but it doesn't support touch events properly which makes it difficult to use. I've been meaning to check out some of the other platforms PhoneGap supports, but just haven't got round to it yet.
Result? 3 frames per second. So that looks like a dead-end.
My preferred strategy is to wait for the next generation of consoles, which should appear in the next year or two. Since Windows 8 is making a big deal of supporting HTML5, it seems reasonable they might also support it in the XBox 720 (or whatever they call it). Other consoles might also support HTML5 themselves. Before then, I don't think there's anything we can do.