new devices are going to change the way we use our windowing managers. For example on my air things close and open so fast I try to close most things (especially those that remember their state) when I'm not looking at them - I don't minimise I close.
Looking at the gnome 3 design can't help wondering if someone shouldn't be thinking of putting it on a tablet eventually (or rather working on a tablet directed branch) - might meet the "open" needs of hackers more than android.