Could Apple come out with a larger laptop than 17" for video editing etc.? What limits the size of the portable computer? Is it the limitation of the battery or would the screen demand too much power or is it too hard to illuminate a laptop screen over 17" and still have a thin portable unit? I am like many who just use my MBP at home or transport it very limited distances such as upstairs to downstairs etc. I would like a larger screen than the 17" for editing video or images etc. I currently use a 15" with a Cinema Screen because the 17" HD screen (although nice) is really just too small for 1920x1200. The 20" Cinema Screen is much better and the 23" is perfect, but obviously the limitation of having to plug the Cinema screen into a plug is a real world issue if I want to go out or move my setup. Is there a battery that can run a Cinema screen so that it does not have to be plugged in or a larger screen that does not require 120 volts?