The old analog TV sets of yesteryear did not have to have a very advanced monitor because the TV signal was only so good anyway, So CRT monitors lasted as the screen choice for decades. But now with HDTV moving the entire viewing experience forward in dramatic fashion, better ways of producing the on-screen image is in full production.
Two of those competing screen technologies are plasma TVs and DLPs (digital light processing TVs). Both types of screen technologies have been around for a while, although DLPs have only become commonplace in recent years. They use completely different means of displaying a TV picture and so each has it's own peculiarities, both for good and bad. So you as the consumer need to weigh the differences and determine which will best fit your own needs.
Plasma TVs are well-known for their high contrast images and vivid colors, and they are generally cheaper than DLP TVs in the larger screen sizes. They have a wide viewing angle, and would make an excellent choice for many people. The drawbacks include less longevity and faster wear rate at higher altitudes above 6,000 to 7,000 feet, and the fact that they tend to run hot and need internal fans to cool them down that can sometimes be noisy depending on the model that you choose. They also can suffer from screen burn-in when an image is left on the screen for a very long time, producing a faint ghost image even when viewing something else.
DLP TVs are are capable of painting the screen with high contrast, color dense images too, although the nod still has to go to plasma TVs in general in this area. They are also easily used as a monitor for almost any digital video source that you have, including your computer. They use a reflective technology to display the screen image and so their picture is very bright and easy to see even in brightly lit rooms. However, they must be viewed at eye level, since the brightness falls off rapidly as you view them from either above or below eye level. The DLP will last almost indefinitely, but the light source must be replaced every 10,000 hours and that will cost over $200 when you do.
Actually either will make a fine choice to use with today's emerging television technologies. Just be aware that each has it's own drawbacks, so choose the monitor that will fit your own particular needs and uses best.