[Samuel_Michon]

“For what conceivable purpose would you want to compare average thickness?”

Along with length, width and depth, that’s what determines the volume of the object (=portability). The Surface Pro has 60% more volume as a MacBook Air 11". And yet, it gets hot, has loud fans, and has less battery life. That’s just bad engineering. As a replacement for a notebook and a tablet, it really should have at least as much battery life as an iPad. Given its volume, that would’ve been possible.

Surface Pro: 10.81 x 6.81 x 0.76" = 55.95 cubic inches

MacBook Air 11": 11.8 x 7.56 x 0.39" = 34.79 cubic inches

EDIT: in an earlier version I mistakenly wrote 'mass' where I meant 'volume'.

[dangrossman]

Weight and size are what determine portability for everyone else, not how much water it could hold if it were doubling as a canteen. That's not mass, it's volume, by the way. The MBA is longer, wider, taller and heavier -- yet you've contrived a way to label that as "more portable"... ridiculous on its face.

I'm not going to make this valueless discussion thread any longer, so to your reply: those numbers are made up. Larger screens make things less portable, not more.

[Samuel_Michon]

The MBA is less than an inch longer and wider (because of the larger screen). It’s not as thick (‘tall’?) as the Surface Pro and it weighs less (2.38lbs) than a Surface Pro with TypeCover (2.55lbs).