Many believe that Apple is pushing CSS annimations and transforms as a possible alternative to Flash. Indeed, months before that functionality was avalable in mainstream Safari, it was available on the iPhone and iPod touch. But Flash isn't on the iPhone. One of the reasons usually given is that it kills the CPU and by extension the battery.
Well we took a look at the CPU usage of the simple falling leaves example on Webkit.org. It used anywhere from 70-90% of a CPU on a 2.0 GHz Unibody MacBook
Obviously this is a beta browser using new technology and some optimizations will undoubtedly be done. However, it is a bad sign for CSS animations which look unlikely to be able to take the pla
