Woah! Would be amazing if they did support it, especially with WebGL support. I really hope they support the Gamepad API instead of mapping controller keys to keyboard keys like they've done before, though.
The real question though is the issue of microsoft not allowing self publishing. I find it hard to believe they would require a publisher for win 8 apps. It might turn out to be the new xbox live indie games section.
I honestly have to wonder though if node webkit exported exes could run on the thing. A lot of the games at e3 were running on win 7 pcs.
Still, it appears that the only one who hasn't come out with support for web tech on their system is sony. C'mon sony, support html5 for games!
@Ashley yeah, but what I'm asking is (and you may not know) how feasible it is for Node-webkit to add the ability to run on these machines. They have PC-like architecture so surely it couldn't be that hard.