well, theoritically the smaller wafer fabrication should have brought down the heat signature anyway, but at the same time implementing faster clocks remains the issue, therefore heat is cooled down to some extent on processors by lowering the wafer fabrication to 65 or below, at the same time they are reaching higher clock speeds, but still are being air cooled. so you cannot predict the future in responce to that as they'll be needing more PSU (again theoriticaly not). as goals are towards getting work done in less time, which not necesarily needs faster clock speeds, quad-core processors and software suporting quad core cpu's can get the work done in twice less as you have it now.
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"