Seen it all before
"Generally speaking, the younger members of the survey groups were keener on 3D TVs than older folk."
Probably because the older folk (or, really, anyone older than about 30) remember all the other attempts to do 3D and how lousy they were.
We also remember when movies had plots, instead of relying on special effect gimmicks to hold the audience's goldfish-like attention for long enough to make some money. Or when TV shows were well written and original, instead of 15 variants on a franchise used as filler between the ads. Or when computer games had no option but to be fun to play because they couldn't rely on looking pretty to make us buy them.
I'd rather have no movie, TV show or video game at all than one which relies entirely on smoke and mirrors to make it seem like it's worth my time. 3D is just elaborate smoke and mirrors.
(Where's the grouchy old bugger icon when you need it?)