Of all the announcements at WWDC, iOS8’s extensibility feature excites me most.

A quick introduction in case you don’t know it — Apple is finally allowing apps to communicate with one another.  For example, let’s say you’re on the Facebook app and you upload a photo; there might be a button to launch Instagram and use Instagram’s filters for that photo while still on the Facebook app.  Instagram’s interface appears like a pop-up over Facebook.

Android actually already has a version of this kind of extensibility, but on first impression I like Apple’s implementation more.

(Isn’t that Apple’s real magic?  Not actually being the first, but being the first to enthrall the press and technorati about something.)

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