I can tell you from my own experience that the newest HDTV antennas are great. (Did you know that cable degrades the picture quality? I never knew that until I used an antenna and saw just how crystal-clear the picture could be.)
And life with Roku, Hulu Plus and Amazon Prime gets me just about anything else I want. If you're thinking about it, give it a shot. You can always go back to your cable monopoly later.