I think Apple should pay attention to some of these mock up gui concepts. I like the simplicity.
As for where the menu bar sits... tough one. Right now, I don't think Apple have got it right. I remember many years ago, there was an interesting 3rd party program that would allow users to "pull" off menus from the menu bar, turning them into a floating pallet. Another good idea, if you have a big screen.
The bottom line is though, if siri actually becomes a fully fledged way of controlling your computer, then menus become redundant and mouse/keystrokes become less of a requirement - I CAN'T WAIT for this... computers should be operated this way and I believe that this is Apple's direction - this is why they don't care about touch screens. Voice control with hand gestures will be the future of Mac.