The Loop-In transportation concept hopes to combine the sensations of surfing and skating in to one device that users can use anywhere.
The outside wheels have the ability to maneuver on a wide variety of surfaces and rotate independently of the board. The designers expect their wheel/board setup will give users the feeling of "pushing on a wave continuously". Hopefully there are plans to manufacture the Loop-In soon, though I doubt it will be able to replicate the thrill of getting barreled. [Tuvie]