I don't think BananaBread was that good of a demo for asm.js. It was a demo for regular WebGL (so for most Javascript engines), done a while ago. If they want to sell us on the combination of asm.js with WebGL, they need to show something even more impressive.
What about the fact that they've ported Unreal Engine 3 and are running it now with full speed inside the browser? I hope we get our hands on it soon, but you can watch the videos of it for now.
It runs OK without asm.js, but it's liquid smooth with it.
Well, that's only the "mobile" Unreal 3. The same engine games on iOS and Android are using. It's not really the "same" Unreal 3 we see used in Devil May Cry 4 and other recent PC games based on it. It's probably a scaled down version even of the original Unreal 3, not the "Samaritan" one.
They probably couldn't have done more even if they wanted to, though, since asm.js or not, browsers can see only use the OpenGL ES 2.0-based WebGL API's. That's why I'm hoping the OpenGL ES 3.0-based (or better) WebGL will arrive very soon, although I haven't even heard if the Khronos group is working on it, so it's possibly they haven't even started yet.
This is the full Unreal Engine 3, all 1 million + lines of C++ code.
The art assets of the Citadel demo are I believe the same as in the Flash demo, which were optimized for a more mobile-friendly and touch-friendly environment.
However we also showed a full Unreal Tournament demo running, as I mentioned in another comment, both at our GDC presentation and in the booth where people could play it. That's a full desktop level.
