I love my MacBook Air. But clearly, it is not for everyone.
I have fond memories (and a lot of chiropractor bills) from the old days when only girls and sissies had wheelie bags and real men hand carried their 50 pound jepp bags and hartmans. But today, it's all about lightness and ease of travel for me. The only thing I like more than my MacBook Air is the EFB!
In all seriousness, the Air sacrifices hard drive capacity, optical drive, battery life and some ports and performance compared to the Pros (not to mention $$ too). But it is an elegant and capable road warrior.