Mine will sort of replace a Windows desktop. I will still use it for games, which I rarely play, and even then really only Counter strike source. I know the Macbook may be able to play it but there is no reason to stress it for be nothing. I'll be using it mostly for school work (Science lab write-ups and such) and Internet, music and movies occasionally. It will be my main computer, and I MAY run Windows in bootcamp or Parallels to use Office 2007 until Mac Office 2008 is released.