obligatory link to Bret Victor's rant on the limitation of touch interfaces: http://worrydream.com/ABriefRantOnTheFutureOfInteractionDesi...
To put it another way: for those of you who program/create via the command line and keyboard shortcuts, could you imagine a touch-setup that would give you more power than what you have with the keyboard? The mouse and GUI hasn't so far...they've added different ways to create content, but arguably these interfaces end up limiting the true power users.