Bought a macbook (I'm not namedropping for the sake of it - the macbook is a tiny wee thing that's also rather sturdy so I can take it with me on hols etc) and not sure I could get a desktop now, even though they are more powerful for a given price etc.
Watching films on trains / surfing the web pretty much anywhere (once I was at girlfriend's granny's and needed to send an urgent email - granny had no computer so I took the macbook out to the town centre and quickly located a wifi network - email sent), tinkering with photos on the move. It's ace.
Now, if apple would bring out a decent game for the macbook.........here's wishing.