The granddaddy of fixed-pixel technologies, LCDs first appeared in pocket calculators in the early 1970s. LCD technology is amazingly versatile, able to power front projectors, rear-projection TVs, and flat-panel displays.
The screen at your local movie theater is obviously a lot larger than the specialty screens used in home theaters, but they actually have a lot in common. The main difference is perforation. The screens in almost every movie theater have the front left, center, and right speakers behind them, along with a few subwoofers.
When a plasma TV isn't displaying an image, the stuff behind the name is just an inert gas - usually a mixture of neon and xenon - but it's a big part of what allows these TVs to measure just 3 to 6 inches thick.
I've been impressed by the image quality of many of the 1080p HDTVs I've seen lately, but to me the biggest surprise over the last year has been the excellent pictures produced by variants on LCoS (liquid crystal on silicon) technology. LCoS uses light reflected from silicon chips covered with liquid crystals - 1080p models boast more than 2 million pixels' worth.
With a 60-inch (diagonal) screen and a cabinet only 5 inches deep, LG's largest plasma HDTV, the DU-60PY10, has the kind of measurements both home theater buffs and interior designers will find enticing. But unlike many of its industrial-style plasma counterparts, this panel is very much a traditional, self-contained TV.