Canvas perf has almost caught up, ... what's lacking is tooling.

Here is Shumway playing back this fantastic animation:

http://www.areweflashyet.com/shumway/examples/inspector/insp...

Performance is okay, but the canvas vector rendering in HTML5 still fails horribly when it comes to adjacent edges.

In that animation, look how the black outlines against the grey clothing leaves a white blur. That's a fundamental flaw that's been with canvas since the beginning, and is a severe problem in the general assumptions of immediate mode rendering. It's especially terrible when doing tiled 2d, or polygons, where these transparent edge gaps stick out the worst.

There's some audio drift, but good to see it's close =)