VPC, while an impressive product, is not a performance item. It does what it says it does: You can run Windows and Windows apps. on an emulated PC on your Mac. Don’t expect fast. Real-world tests indicate a 1GHz PPC runs about as fast as a 300MHz PII using software 3D graphics; so you’re talking dog-ass slow for games.
However, VPC 7.0 will (according to Microsoft, so you have to take it with a few dashes of salt) run faster, take advantage of dual processors to emulate multithreading, and also use the Mac’s GPU to handle graphics. If the software delivers on its promise, it could provide a viable way to play older PC games that don’t need much more than maybe a 450MHz PIII with circa Y2K GPU technology on the fastest G4 system. It’s hard to know how it will perform on a G5, becauses the software had to get a major overhaul to be compatible with the PPC970 (which lacks a way to handle either little-endian or big-endian byte-order-reliant softare on the chip, unlike the G4…as a result, cycle-for-cycle, the G5 might not perform as well as a G4).
VPC keeps getting delayed. The most recent excuse is u$oft had to wait until the latest WinXP service pack was out before releasing it. I’m skeptical (couldn’t I run Win2k just fine without the WinXP update? Answer: Yes, yes I could). Preliminary viewings of VPC 7.0 showed it to be buggy as all hell, so it’s probably still getting kinks ironed out. Expect it maybe in the fall. I think it will be worth holding off until then, if games are what you’re interested in.