As usual, the ideas that originated at webOS are dripping down to other operating systems. And no one is more bold in claiming webOS ideas as their own as Microsoft. Cue all those people who buy that propaganda and accuse Apple of copying the original thief, Microsoft.

The first one to copy webOS was Meego/Harmattan (Skillman bringing his ideas with him to Nokia).
Then Microsoft who claimed all those things as their own. Unified contact list, card based multitasking (WP don't even has proper multitasking).
Then Blackberry with their tablet OS and later with BB10.
Android with card UI, but now in vertical form instead horizontal. Yeah, I know, very innovative people at google there.
And now, at last, Apple.

But they really should have copied the multitasking of Maemo 5, which is still the best. Or even better, combine the Maemo 5 grid view in multitasking with stacked cards from webOS. THAT is the best multitasking view.

Edit: Actual, the first one to make a swipe gesture based mobile OS was Neonode. All kinds of swipes there.