I would argue that they should be. CSS is well understood by designers/programmers and doing animations all in JS is error prone and off course a CPU hog. Hardw

I would argue that they should be. CSS is well understood by designers/programmers and doing animations all in JS is error prone and off course a CPU hog. Hardware acceleration is particularly important when you're talking about devices with underpowered CPUs (Android). On my iPad/iPhone CSS animations outperform JS animations by a ridiculous margin.