From what I can tell, the portable computer form factor has become the most desired one of all.
People buy full desktop or tower computers only because they are cheaper.
If given a choice, people tend to prefer owning portable machines. Current Preferences I use the IBM ThinkPad 600E, which IBM tells me is the most popular ThinkPad the company has ever manufactured. Most of the IBM executives use it. The closest family member is the ThinkPad 570, which is the successor to the ThinkPad 560. The ThinkPad 570 is very slick-looking and weighs just over 4 pounds but contains no disk of any sort.