It’s a pity Escher died 3 years before fractals were discovered.  I want me some infinite staircase of infinite complexity.

Copy-paste keyboard shortcuts aren’t particularly intuitive, but they sure are powerful.  I think over the coming years we’ll see lots of these non-obvious, yet powerful gestures come to touch UI.  Which makes you wonder: Is touch inherently more intuitive than cursor? Or is it just because we’re still in the early days, where the apps are just simpler?