The folks over at Lenovo produced a spoof of Apple's MacBook Air commercial where it fits inside of an envelope, demonstrating why their notebook computer is actually way more portable.
This is exactly what I was thinking of the first time I saw that ad for the macbook air. Sure, it's thin but has NOTHING included, so who really cares? My Dell XPS 1210 is way more ultraportable when it comes down to it, and so is the regular macbook for that matter.