Well, it's been a long time coming (early HDTV's must be nearly ready to break and need replacing) but finally broadcasters other than Sky have woken up to the fact that HDTV is the future.
Last week, ITV announced they'd have a HD simulcast of ITV1 up and running by next Spring. Yesterday, the BBC announced they'd got the go-ahead to turn their BBC HD test service into a fully fledged channel "as soon as possible" and today Channel 4 say they'll have Channel 4 HD available by December. I can't see C5 getting left behind (especially as most of their stuff is imports already made in HD) so hopefully by next Spring all of the terrestrial channels will be available in High Def.