You've heard about LCDs. You've heard about plasmas. Maybe even you even understand all the pros and cons between them. But what are all these "LED televisions" we keep hearing about? With the crop of LED-backlit HDTVs announced at this year's Consumer Electronics Show finally starting to hit the streets in force, it's a question we hear a lot from budding home theater shoppers. Blame the acronyms. While yesterday's consumers had to make a simple choice between CRT and rear-projection television sets, today's consumers are confronted with plasma, LCD, DLP, OLED, and laser televisions. And now, the age-old term LED has been stirred into the mix. Let's take a look at what those three magic letters mean, how they apply to televisions, and why you might want to consider buying one.