Your own personal bike lane

How cool is this? The LightLane "personal bike path": a bike lane created by lasers attached to a rear LED light. It's still being developed (in Boston, yay!), as of reports from last summer, but I love the idea and would be happy to see it in stores.

Here's a video of a prototype being tested on urban streets, which does a good job of showing how this might work under a variety of typical lighting conditions.