With the right architecture (x86, fast virtualization options on, Intel tools installed) GenyMotion is not faster than the current Android emulator so there's no advantage there. On top of that, with the 2.0 emulator, deploy speeds are much faster.

Personally I loved Genymotion and used it for all my emulator testing (although the vast majority of my testing was done on a real device). But with Android 2+, it's the opposite: 99% of my testing is done on the default emulator (the rest is using a device). It's that good.