> In reality the back was curved, and they took pictures from an angle that only showed off the edge of the screen and not how far back it curved

You only see the thickness at the back from an angle where you can't actually use the computer (and for many people, that whole angle is going to be against the wall). This is the good kind of design - making something appear beautiful without compromising the core function.

I'm distinctly less convinced about ever-thinner mobile devices that I immediately have to slap a case on...