I get the feeling that in the past few years, with the rise of things like Netflix and Amazon and the TV catch-up sites on the one hand and streaming sites on the other, the notion of 'watching TV' has pretty much become obsolete anyway. Whereas before you had to keep to the broadcaster's scedule, you can now watch pretty much what you want, when you want. (and on what you want as well, from a TV to your laptop to your phone)
Of course, this is from the perspective of someone born in the mid-90s and who's had a decent internet connection all his life - other people's experiences will vary wildly, I suppose.
I will say that while I don't watch many TV programmes any more, I do sort of miss that. There's good stuff out there, from documentaries to dramas and comedy, but I just don't seem to have the time these days.