There is such a thing as true HD TVs - there are 2 sitting in my place of work. They are CRTs though which were designed for HDTV in Japan, Korea etc.
Plasma and LCD have went towards computer screen resolutions, because it was the only real HD source available in the past - that's all changing now though, LG have released the first true high definition Plasma TV with a native resolution of 1920 x 1080p. Probably won't be cheap as it's 71".
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Yes, but if you look, I said, "either LCD or Plasma". As far as I know there are no plans to introduce CRT HD TVs for general sale in this country. Mind you CRT is superior to any other technology at the moment and you never know, somebody might introduce a PAL model for europe. They are very big and heavy though especially at the sort of screen sizes (32"+) which are popular here.