If Netflix survives their Epic Corporate Fail campaign currently underway, maybe someday they'll come to the UK, too.
Despite all the squalling about them, in America Netflix is far the better deal vs extortionate cable rates. Free broadcast TV is virtually worthless now. Netflix is under attack precisely because it's such a good deal, undercutting people's motives to pay what Hollywood wants them to for a) theatrical releases and b) cable TV.
Movies on TV are very hit or miss; I can line up every new theatrical release on Netflix as I hear about them (usually months before DVD release), but when and how would I ever find out if a particular movie is playing on TV? And movies tend to be shown on cable anyway, rather than broadcast, so they can't be counted as "free" or even cheap.
But crucially the difference is you can get 40+ channels free over the air,
Wow! We only get five free channels and they're hardly worth bothering with.