ON TOPIC: This will get Intel ahead of the game, but I'm wondering when this technology will hit GPUs and start lowering the amount of heat that are emitted from computers or any other technology that uses transistors. This will definitely increase usage life of CPUs... my question is, why didn't they think of this before? It seems like a simple enough concept, but I guess the technology to make such small circuits hadn't caught up yet.
TSMC and GF have announced the FinFET process only for the 14nm node, since it seems “FinFETs require changes in circuit design (especially analog), tools and IP throughout the whole ecosystem”, and their customers need time to make those changes in their own workflow.
Your question has already been answered anyway. 14nm is in 2014 on GF’s roadmap, and in “the foreseeable future” for TSMC’s. Since those two fabs are where most gaming GPUs are manufactured (neither Nvidia nor AMD have their own manufacturing facilities), that’s roughly when you can expect to hear news about their production. Of course, things aren’t that simple since the switch to tri-gate transistors will require changes in chip design (as mentioned above).
[edit] Silly me, I overlooked one really obvious thing: we will be seeing 22nm tri-gate transistors in Intel (integrated) GPUs on Ivy Bridge, so expect that as early as 2012

And what do you mean by “why haven’t they thought of this before?”
Intel will introduce a revolutionary 3-D transistor design called Tri-Gate, first disclosed by Intel in 2002, into high-volume manufacturing at the 22-nanometer (nm) node in an Intel chip codenamed "Ivy Bridge."
That was when they
disclosed it, by the way; the research that went into it probably took place years earlier, and likewise the idea that led to said research. Someone already thought of this
before you even knew what a processor core is! Newy’s right; his mention of chip production is relevant, even if you don’t see its relevance. Moving a chip to a smaller process node is not something one can do at the snap of one’s fingers.
Not once in this entire thread did I start talking about production of 3D chips.
Nobody even mentioned 3D chips — these are “3D” transistors we’re talking about, being used in a
planar chip design. 3D chips are yet to be announced on roadmaps . . .