Games and Video/Photo editing, certainly takes advantage of 64bit and Excel Work spreadsheets caculate faster. No matter how you look at it, 64 bit OSes, 4GB or more memory and Quad core processors are mainstream these days. 45% of new Windows 7 Installs are x64bit. At work alone, we are pushing 85% of our Windows 7 Installs and upgrades out in Windows 7 x64bit. Overal Computers are faster alone with Windows x64