LED isn’t really new technology, its just a smart use of existing technology.  Instead of lighting the same LCD screen with fluorescent lights and diffusing it (so that it is evenly lit), Samsung uses a big Lite Brite surface with all white lights.  This makes the TV more energy efficient and thinner too.  This is not however OLED which is much cooler technology, even thinner and brighter with greater color saturation.  The only OLED TV on the market today is the $2500 is the Sony XEL-1.  Still its an awesome TV and pretty good price too.

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Samsung UN55B8000 55-Inch 1080p 240 Hz LED HDTV