As Hoyte Stearns pointed out, upcoming DLP projection televisions
will use an array of lasers instead of a bright light and color wheel. See:
http://www.technologyreview.com/NanoTech/17651/
". . . the main advantage that lasers offer over traditional
projection is an increased richness in colors, says Mooradian. The
color of light produced by a laser is, by definition, spectrally
narrow, varying less than one nanometer on either side of the peak
wavelength. . . ."
The lasers should last longer than white lights, too.
- Jed
