Become a fan of h2g2
Using resolutions vastly exceeding DVD and Dolby digital sound. HDTV is clearly superior to existing technology. however, HDTV does have one major disadvantage,as systems cost about $5000 and are only currently available in the US.
Hopefully DVD will catch up with HDTV shortly, and will be available internationaly for home cinema's (which will be a great improvement on the 740*480/720*586 systems available at the moment!!)