The 15" MacBook Pro is a very bulky, heavy laptop. /QUOTE]
(directed to everyone who would agree with the above quoted statement, thereby making the following statement NOT a person attach)
OMG, what kind of a puny, 98lb weakling would describe a 15in MBP as "very" bulky and "heavy"? There are reasons why Apple makes MacBook Airs, one of which is that if you want want a reduced-function computer that has all the new cool looks (as opposed to function) in a size that said 98-lb weaklings can carry around there's a Mac for you.
Frankly I like laptops that can do lots of things and that have much of the flexibility that a desktop computer has. Hopefully the 17in will retain its current status of being more useful than an Air.