Originally Posted by wolfing 
I don't know in what world you're living, but all the computers I see around me have 1GB. Mine has 2 and I don't see a reason to upgrade yet (of course, I use XP). In fact, I still haven't seen one computer with more than 2GB except the servers in my company.
I know many who bought 4gb. There's not many, but some games benefit from having 3gb over 2gb such as Assassins Creed. The thing is not that there's a huge benefit of having it, it's just that 4gb is really cheap, and it's not uncommon to see most memorypackages in onlinestores that are sold in 4gb kits rather than 2gb kits.