I think thinness and lightness makes devices more usable. I currently own a 2007 MacBook Pro and a Dell XPS 13 (2014 I think), and the difference in traveling with them is so much more significant than I ever would have guessed before getting the XPS.

Thin and light go hand-in-hand too; speaking in generalities, one probably begets the other.

And, as the tech gets smaller and lighter, it can go in more places. I have to think that Apple's obsession with thinness on the iPhone led to the Watch (which receives criticism for...being too thick).

I have a Lenovo T450s and Yoga 2. The Yoga 2 is probably half the thickness of the T450s but weights about twice as much. I prefer carrying the T450s.

I agree. And I'd rather have a laptop a few millimeters thicker and have a bigger battery inside.

Then you buy the thick ones, and I'll buy this one.

Ahah, yes of course :) But this also applies to smartphones, and it seems like the trend nowadays is only to make them thinner.

The thinner the laptop the more practical it is use -- to a point. I've had many laptops but I've never used a laptop more than my Asus ultrabook. It's just so easy to carry around, pack, and grab for even small tasks.