I would agree with your comment if not for the fact that Apple invented a whole new terraced battery design (watch the keynote) in order to pack the thing full

I would agree with your comment if not for the fact that Apple invented a whole new terraced battery design (watch the keynote) in order to pack the thing full of batteries, and the thing has 9 hours battery life. The laptop is basically a keyboard, a screen, a tiny logic board and a huge battery.