Wonder if these guys are accounting for the people that build their own systems. I doubt it.. I would presume this is a significant market, considering the success of places like newegg and zipzoomfly..
http://news.yahoo.com/s/ap/20050606/ap_on_hi_te/notebooks_vs_desktops
http://news.yahoo.com/s/ap/20050606/ap_on_hi_te/notebooks_vs_desktops