this is extremely rough and is meant more of to give you an idea of what the next step apple will take in their computer ui with a multi touch platform and a multi-touch display. tell me if you think this is the right approach to their next display. altered hinges would be where the yellow is.
Like most multi-touch desktop computer solutions, this is ergonomically problematic.
Try this: sit in front of any desktop computer. Place the keyboard and mouse as directly under the display as possible, to mimic this design. On a G5 or Intel iMac (including the current metal one), you should be able to put it on the "foot". Now, spend an hour typing and mousing like that.
Uncomfortable? Hmm... reaching out seems to be a problem. Let's see what happens if you move the display. Keeping the keyboard and mouse still directly under the display, move the display closer, to give your arms a rest and enable your elbows to take a relaxed L shape position. Now spend an hour like that. How are your eyes? 30" display, you say? Oh dear, you may need a cornea transplant.
The correct position for a desktop computer is for both the keyboard and mouse to be basically directly in front of you. When you're typing, your upper arm should be largely vertical, while your forearm should be horizontal. The mouse should be directly next to the keyboard - you should not need to stretch to reach it, you should be able to shift your hand from the keyboard to the mouse without moving your elbow significantly. The top of the display should be just below eye level, and it should be positioned a comfortable distance away. If I stretch my arm directly out, I can only just touch my 20" iMac. Now, multi-touch that.