Where did you get this idea from? AMD has been insisting since day one that 4x4 is a platform for gamers and enthusiasts, and this article seems to agree with that (not to say that I do). Why would 4x4 be server oriented when they already have s940 and sF for that reason?this is aimed at servers. it'll be good for businesses that need the processing power.
And FYI all I've heard is that it supports dualies, not quads, not you're looking at eight cores tops, not 16, although if you can point me where you heard otherwise I'll change my mind. Again though, Opterons and Xeons have already offered 16 core capable workstations so this isn't anything revolutionary