Any chance the JS (or whatever stuff) is being precompiled here? Main reason I ask is that the Wii U CPU ain't that fast and I'd sort of expect it to have trouble with complex web apps...then again I guess the newer JS engines compile on the fly to an extent these days.
Anyway this whole thing reminds me of the
ES OS project from a while back, which appears to still be alive, albeit now it's "currently being developed mainly at Esrille" (which has a
"cafe" page, although I suspect that's just a coincidence). Whatever the case the hopes I had for that project are coming true whether it's related or not. I made a post a while back about wishing this would end up as some open dev environment for indies and it's actually happening, more or less.
Are any of the game streaming services still around independently? An idea I heard a while back was to use a video stream on a webpage while using the input for the controls, wonder if that's possible with this stuff.