Less weight would probably be one reason. Since the thing is all touch screen you don't have to worry about hauling an attached keyboard as well as screen. Another weight loss would be the loss of cd/dvd drive and the components that go with it. That's the only real reason I can figure out as to why to get one. However, if you want lose the weight just go buy a netbook. No drive, 1/4 the weight of your average laptop (and I think that's the heavy side).......More or less I think it's just a status thing like owning an iphone, droid, or high end blackberry.

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"BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Will he offer me his mouth? BOY: Yes. GIRL: Will he offer me his teeth? BOY: Yes. GIRL: Will he offer me his jaws? BOY: Yes. GIRL: Will he offer me his hunger? BOY: Yes. GIRL: Again, will he offer me his hunger? BOY: Yes! GIRL: Yes. BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Yes. BOY: I bet you say that to all the boys!" -Meatloaf