Cases in point:
One is the multimedia work of artist Toni Dove. I ran into an account of her work on NPR, and soon after tracked down her website, etc. It's not mobile media in the sense of "take it anywhere in your pocket," but it certainly is mobile in the sense of exploring new forms of expression and engagement.
Two is a much more pedestrian, but that tries to make something new with mobile. From our geek friends at Google, this distributed game called "Chrome Super Sync Sports" hooks up your smartphone and computer to play the game against four remote contestants. The point is not the game as much as it is exploring the way to hook together these often discrete devices.
As I mentioned, these are gizmos and uses as yet without a clear home. But that's where innovation lives, right?