It works in Chrome latest, but it is a bit laggy on what should be powerful and fairly modern laptop (Core i5, Windows Rating 5.9). I guess it's about 10 fps away from what I would consider "sufficiently" smooth, but maybe that goes more along the lines of showing what people now have come to expect of the web rather than being a shortcoming of HTML/JS-solutions.

As for this thread, today I learned that MSIE9 is actually released. Time to get updating :)