My AMD Athlon 64 3200+ already handles all of the Photoshop work I can throw at it. The next step is to speed up my Pinnacle Studio video rendering — we just have to hope someone recodes the renderer for 2 cores.
I wish I had time for games, perhaps someone will one day make a game that uses dual cores, but I doubt it would catch on. I could use a dual core system at work, however. I’m forever compiling 2 different programs at the same time (or could be).