What is it really? Games obviously and 3D apps but what else? Seems like many people have the view that it'll benefit almost everything. Does it really? I have an old P4 PC with a 30 inch screen and a crappy GF 7600 GS. I've seen alot of slowness with the 6 year old workhorse but nothing that I could with certainty point out as being graphics card related. I'm looking for a Mac Pro for non professional Photoshop, Lightroom and HDV editing..... I guess they are the usual heavy 2D graphics apps that people use. Is there a real benefit from a 4870 compared to a GT 120?