I agree to a point.
I have the WD 7200rpm 320GB in my laptop shortstroked to 100GB. Works a treat. Plenty of space still.
I also agree that this doesnt fit all folks. I just dont see the need to carry my entire 'digital life' around with me. I have yet to find myself needing 278 hours of audio or the contents of Blockbuster video on the go. Very few folks want to look at my 407 holiday snaps of Canada 2008 either.
Plus if you lose that laptop......you did encrypt it didnt you? Ahhh I guess not.