Marco Arment:

Copying iOS 7 is going to be a big problem for cheap hardware. iOS 7’s appearance and dynamics require a powerful GPU and advanced, finely tuned, fully hardware-accelerated graphics and animation APIs. This will hurt web imitators most, but it’s also going to be problematic for Android: while high-end Android phones have mostly caught up in GPU performance, and recent Android versions have improved UI acceleration, most Android devices sold are neither high-end nor up-to-date. The gap is much wider in tablets, and even “high-end” tablets usually have insufficient GPU power to drive their high-DPI screens.

Try copying iOS 7, assholes.