Economics again. The cheapest, crappiest, PoS cheap cheap cheap terrible LCD ever COULD HAVE BEEN WORSE AND CHEAPER. The most expensive, best best best ever top of the line only sold to 3 millionaires TV COULD HAVE BEEN BETTER AND MORE EXPENSIVE. There is no dichotomy, it's always a sliding scale that works on the margins, and "inferior" technology is constantly being used being of price. In agriculture, lime is used to raise the pH of fields, even though lime is one of the weakest bases you can find. In technology terms, lime would be akin to the first visualizing screen ever produced that is large, uses a ton of energy and looks like shit. The reason lime is the industry standard is because it is cheap and plentiful, and even though you have to use a ton of it to accomplish what a small amount of strong base could do, it's still cheaper to use lime.
LCD, plasma, CRT, all of these techs have plusses and minuses, and their relative traits will change as each is developed. MIT just came out with an incandescent bulb that is more efficient than compact fluorescent. What?! Compact fluorescent is more efficient right? At certain points in their technological history, various methods are more or less effective, cost efficient etc. Imagine if all of a sudden there was a resource that only LCD needed that became extremely scarce, then they would no longer be cost effective the way they are now. Similarly, at some point in the future a cathode ray tube may be able to produce perfect geometry with a very flat, low-weight build. At this moment, however, the market has chosen LCD because it can put more pixels (that may look, depending on the quality of the set, a little less good) on the screen for less money and with less bulk and footprint in your room. If you want something better, as always, you have to pay for it, and don't be surprised if there are not enough of you out there to justify for a major corporation to devote huge sums of capital to producing for.