I could use a 64GB as most of my media is in the cloud now. I'd have to get rid of the Windows install all on Air, but it'd be very do able. Spotify for music, Netflix/Hulu for video and Windows XP in Citrix XenApp none of which would take of the amount of space a standard local files would.
That said, I have a desktop as well and my Air would be largely for notes in class, writing papers and browsing the web along with streaming media.
That said, I have a desktop as well and my Air would be largely for notes in class, writing papers and browsing the web along with streaming media.