Here are some of the iOS features that Apple has "shoehorned into Mac OS X" Lion which I am quite sure will appear in Linux free desktops in future: auto-save (system-integrated save versioning, integrated with backup); resume; airdrop (local file sharing without having to be on the same wlan). Even the full-screen feature, which seems pretty funny on the face of it, is actually more akin to Opera's "kiosk mode" than a regular full-screened application, and I am sure it will show up elsewhere.