You think THAT'S cool? Dude, check out blue lasers! They triple own green and red lasers, combined. Finally with red, green, and blue lasers, holographics is possible.

Eh, I think green is cooler. Blue lasers at 432nm are more powerful but they are only about as bright as green laser because (and this is taken directly from wikipedia)

"The apparent brightness of a spot from a laser beam depends not only on the optical power of the laser and the reflectivity of the surface, but also on the color response of the human eye. For the same optical power, the green laser will seem brighter than other colors because the human eye is most sensitive in the green area of spectrum (for low light levels), with sensitivity decreasing as colors become redder or bluer."