“[T]he Mac App Store is bringing people over to the Mac OS from iPhone and the amount of “Why won’t my iOS code compile on Mac OS X?” questions on the developer forums is making me worry. If you’re considering porting your iPad/iPhone UI to Mac OS X (or any desktop OS, for that matter) please read this first.”
Analysing a Touch-to-Desktop UI port using Fitts’s Law: Reeder for Mac Beta | Daniel Kennett
This is something you need to read now. Read it until your eyes bleed.
That is all.