Don't think I've ever watched anything in HD, well unless it was on the big screen down the local boozer but even if it was i didn't notice it. Until they bring out a TV that does 3D without those stupid glasses i couldn't be arsed with anything other than regular Telly
I've D/L'd a few fights in HD and its an improvement over SD but, for me, its not a deal breaker as far as sports coverage is concerned.
I was exactly the same after going to the cinema to watch a couple of films in 3D. But glasses were thrown in with the tv anyway and I've found it more impressive on the tv than the cinema. Never seen anyting in an IMAX tho. Although sometimes I'll just watch the footy normally even if there's a 3D option anyway as it can seem a like a computerised subbuteo game after a while. The boxing was superb tho