3D. Bleh!
Why? Because in case they haven't noticed, we're in a middle of a recession, everybody's just bought new TVs for the latest "in thing" (HD) and now they want us to spunk thousands more on new sets that typically don't have anywhere near as good a picture qualtiy as the sets we've just bought and have lots of inconvenient problems with them... i.e. very little content, no real standards in place and the content that there is out there is either the ghastly "throw things at the viewer" type or the hacked up "more 3D than real life" abortion that is Sky Sports 3D.
Our broadcast systems are still suffering with the con whereby the move to Digital gave us lots of channels all with piss poor picture quality (due to the limited bandwidth available to each channel and the cost of it from the suppliers let alone the politics that are involved). Then the broadcasters launched HD where, without adding much extra capacity did the bandwidth come from? By lowering the bit rate of the SD channels and thereby making the difference more marked than it should be - same old trick that was performed with CD and the poor quality plastics that suddenly started being used in vinyl records.
Now we have 3D channels into the mix where something also has to give due to the bandwidth restrictions... either other channels, the refresh rate of the frames, or the quality of the frames/audio. Stiched up? bet we are!
Sky isn't about to launch lots more satellites to provide more broadcast bandwidth right now - due to economic their play is likely to have to be Internet supplied content as it's the only real way they can compete in the long term.
In theory Virgin Media has the infrastructure in place, albeit with costly upgrades to a lot of kit required but good chunks of this can be accounted for in the steady churn of consumer units that only have a few years operational reliability in them anyway (this isn't a dig at VM, it's normal for kit). VM's strength is that they own the deployment infrastructure therefore it can be upgraded to suit their requirements - shame about their weaknesses... the problems still caused by multiple "competing" companies being merged and their still atrocious customer support... and their regular spats with Sky.
Freeview has much cheaper infrastructure upgrade potential however due to the piecemeal way the standards were flung out there and the short sighted initial vision consumers are left with poorly performing kit that's practically obsolete by the time it arrives. Couple this with advert blighted EPGs and it's not a nice environment for the end consumer.