The summary describes TiVo as kind of a glorified cable box. However I believe (from personal experience) that TiVo's greatest feature is that it lets you cut the cable altogether. TiVo can act as a DVR for your antenna -- a feature that is a reason many stay with cable nowadays -- and supplements free, local programming with thousands of on-demand shows over the internet. I am over 25 miles from the nearest TV transmitter and I can still receive dozens of local channels with excellent quality and better reliability than satellite.
I no longer pay outrageous cable or satellite bills. I installed a rooftop antenna that, including amplifier, antenna, and mounting hardware, cost less than a once month subscription to my satellite provider. If you are dissatisfied with cable/satellite pricing, programs, and paying to be advertised to, then stop paying them!