TurkishTerror:
buying a desktop computer JUST TO PLAY WGT
does that mean i have a problem?? I dont want a desktop, but the only reason I would buy one is to play WGT.
Important Q: Why do you want to get the new one?
IMHO the need depends on the laptop. You don't want an outdated Win XP machine with small memory installed - the 1 GB netbook which I have is a PITA.
OTOH, with Win 7 and some more RAM than the minimum requirements, there should be no reason to leave it. Then, the potential problems are in the peripherals. Get yourself a basic wired(!) mouse, perfect for dinging, perhaps an old monitor for better views - done!
One additional item may be your LAN. Traffic there, e.g. from other computers, may disturb the game AFAIK, but this happens with any game PC.