Innovative lighting system for bicycles, successfully funded on Kickstarter, maybe nearest thing anyone gets to having a TRON-like light cycle:
What is the Revolights bike lighting system? Our lighting system consists of 2 thin profile LED rings (white in front, red in back) that mount directly to each wheel rim (just below the brake calipers) using a series of rim specific clips. Power is supplied via a thin wire to the hub where a lightweight and slim, USB rechargeable polymer lithium-ion battery is held in a special bracket. A small magnet is secured to the fork to provide speed and orientation information to the rings.
RevoLights has an official Tumblr blog here
More info from their KickStarter page can be found here