I'm in the US, we have Charter for internet and AT&T for cable (good UI). Both offer cable.
We aren't there yet, but I could see, through terribly lengthy litigation, a class action that forces local monopolies to divest internet and cable offerings. You can offer one, an independent company has to offer the other.
That said, I do have two internet choices, and Charter isn't bad at all ($40 per month unbundled, uncapped, 100/10 service, we stream 3-4 hours a day, no problems). The cable is expensive but it keeps the Mrs. happy (Can't Buy Me Love is a bullshit song).
AT&T wasn't bad internet either, just much slower DSL service.