Let me be that guy and ask: what's the point? Who wants a thinner laptop (besides Steve Jobs)? I understand the drive for lighter laptops but thinner poses engineering challenges (in cooling) which drives up costs. I just don't understand the point.
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).