Clean Laser Systems of Germany has announced the release of the "first real fully mobile cleaning laser unit in the world. Available in electric versions or rechargeable battery powered, the laser unit consists of an air cooled "state of the art" diode pumped laser with an excellent laser beam quality and an ultra small focus."
In layman's terms what they have done here is "invented" the backpacks from Ghostbusters. I had one of these when I was ten, it just looked a lot more like my mom's canister vacuum, and if you want to get technical, there was no laser involved - there was, however, a stair cleaning attachment.
Backpack Laser Cleaner [Official Site]