I don't think that Flash will be replaces by HTML5 and Js just because Apple said it but is a nice alternativ for some effects and animations even that Internet Explorer does not render these FXs. So I try to see how the broser is rendering and runing some canvas background on my page. On the animation background changing color onmousemove is slow, not real time 100%, maybe the js is not optimized for this. But without event on mouse looks nice and doesn't use CPU to much. Also font family is a awesome feature of css3 and specially because I love had writting fonts, I start to replace all Arial fonts with new css3 external font (eot and ttf format). The future of design looks better and better with these design features.