Forbes:

The Apple Store pays attention to every detail. You might think that Apple positions all its notebook computers for aesthetic reasons. That’s partly true.The tables are uncluttered and the products are clean. But the main reason notebook computers screens are slightly angled is to encourage customers to adjust the screen to their ideal viewing angle—in other words, to touch the computer!

I know some people who work in this division. They are completely insane about these kinds of details. One of the reasons why the Apple Store experience is so special and unique.