One debate we hoped to squelch with this test was whether DLP could match LCoS on image detail. Both sets are spec'd at the 1,920 x 1,080-pixel resolution that defines a 1080p display, but they deliver the image differently. LCoS TVs use microdisplay chips that have a discrete 1,920 x 1,080-pixel grid; all the pixels on the chip appear simultaneously on the screen. DLP currently achieves 1080p resolution using a technique called "wobulation": the pixels are split between two fields flashed up in rapid succession, each with half the total pixels..Read on over here.
DLP vs LCoS HDTVs

Sound and Vision Magazine compares the DLP with the LCoS HDTV technology: