Today that isn't a difficult choice because most cable TV service providers now offer Internet. This normally is a package deal. Furthermore, there are some internet services where you can stream the contents to your TV.
However, if you live in a country like I do where your internet and cable TV are different and not on one monthly bill, I would give up the TV any day. I never spend that much time watching TV as it is. I'd rather just watch a good movie online from a paid service I have subscribed to. I normally am so busy working I don't have time to watch TV at all.
In my home, the TV is only turned on 4 days a month when my husband is here. I personally don't find the TV in our area worth watching and there is too much junk on it and never a good movie or much of anything else. Even though we have several channels to select from most of them repeat documentaries over an over again. If you've seen it once there is no need to see it again.