not just gaming but building games
Couple of years ago I spent a week using a dual Xeon PC, lots of cores (12?). Then I had to go home and watch my 6 core Phenom 1100T chew through massive C++ compile jobs at less than half the speed - despite clocking >1GHz higher. Very nice compile engines.
An i7 with that many cores has me eyeing the bank balance... even with Intel price gouging.