Yeah, I'm well aware of the UK switch over from analogue and the big refit - what a farce really. Oh well.
Though I seriously do think that streaming will be the norm in the not to distant future - in essence anyone who has Virgin is already doing this... and has been for years. Yes it comes through to your TV but behind it is a server just streaming data down the fibre optic, its just the process of stick these data stream into a web browser, just like the iplayer and job done.
I understand that Ubuntu isn't up to what you want but still, its one small thing really... and I don't think the average linux user is probably that bothered, as they probably all have TiVo or something similar to do this now. I'm so tempted to go out and buy an apple tv...