In three years, there won't be any. Instead, think about screens just as displays and let the receivers melt into the background. The bits will come from the sky, the basement and the airwaves. You will download the tuner if you still need one. High definition will become my definition.
Television is images now , the internet is words and pictures anytime .
WEB-TV brings those words to the living room, best for novice email. TiVo goes a step further and turns TV into a magazine. At the same time it is the first serious challenge to commercials. Both would be better done as capabilities than as products. The magic is letting the audience define the products for themselves.