These aren't exactly new news. I've had a 7850k since March/April. It's a nice CPU, with my main complains being that
a) It gets hot very quickly
b) The accompanying heatsink/fan is crap
The nice part:
The APU is quite nice for gaming. I haven't had any issues running most games at 1080p with graphics settings cranked, especially mantle-enabled stuff (BF4, etc). I've got dual-monitors, but I haven't played much which takes advantage of that so while gaming it's usually 1 for the game and another running monitoring/benchmarking.
It won't likely compare well to a hardcare rig with beefy dedicated graphics cards. Against my mid-level gaming rigs that had a mid-range graphics card, the APUt compared nicely, with the advantage of being more compact when using a mini-itx board.