D-ILA LCOS is better.

One of the newest rear-projection display technologies, LCOS (or LCoS) is similar to LCD (HTPS) and consists of a liquid crystal layer which sits on top of a pixelated, highly reflective substrate. Below the substrate exists another layer containing the electronics to activate the pixels. This assembly is combined into a panel and packaged for use in a projection subsystem. Currently LCOS light valves are manufactured in 1280 x 768 (720p) and 1920 x 1080 (1080p) chip configurations.

The future. Better, faster, cheaper. LCOS technology is still relatively expensive compared to LCD and DLP, but with Intel stepping up mass production this year that can be expected to change. According to Intel, in 2005 it will be possible for the cost of a single-panel LCOS light engine to drop below the cost of DLP and LCD light engines. This means that HDTVs based on Intel's LCOS technology may be less expensive than the competition.

Philips 55PL9773 Cineos LCOS Television

Digital Direct Drive Image Light Amplifier (D-ILA)
LCOS Projection
The D-ILA device, a special LCOS technology developed by JVC, is a reflective type of LCD that delivers a greater amount of light than a transmissive LCD panel and is comprised of groups of pixels which correspond to each image dot. Also, unlike conventional LCD panels (in which the switches and electronics are mounted on the same surface as the pixels), the D-ILA 's driving IC substrate is located behind the liquid crystal layer. Because of this, the “screen door effect” found in many LCD projectors is eliminated almost entirely, leaving a nearly-seamless picture which is very impressive. D-ILA and DLP will be battling it out for the next several years, something that will undoubtedly be good for the market and will result in some excellent "trickle-down" technologies for the home theater user.
The D-ILA technology is based on an innovation in microchip design that packs 2048 x 1536 pixels on a single 1.3" chip (labeled a QXGA device). This makes possible display of HD images at full-spec resolution of 1920 x 1080 (with support for 1080p possible). Overall, D-ILA projectors produce higher resolutions, better contrast ratios, less image artifacts, and better tonal and color information than just about any LCD front projection device.
JVC HD-61Z795 D-ILA Projection Television $4,999.95
JVC HD-61Z575 D-ILA Projection Television $3,499.95
JVC HD-52Z795 D-ILA Projection Television $3,999.95
JVC HD-52Z575 D-ILA Projection Television $2,899.95