However, I don't see the real benefit of apple (or others) having patents like this. If they could not patent it, I think they would have included it in their product anyway. It's a cool feature. They got a head start. That's the value of creating something new--a head start. Things move too fast for there to be any real benefit to the general good by granting monopolies for 17 years. People will still create things because you can make a lot of money with a head start, particularly if you're the type of person/company that can maintain that lead by continuing to build great products without resorting to monopoly tactics.
The dropdown menu is a good example where I don't see much difference between a dropdown menu and pinch to zoom.