Aereo is based on a very simple idea. Many people want to cut the cable cord, but find it hard to watch the major broadcast networks even with an over-the-air (OTA) antenna. Aereo takes several existing technologies and creates a packaged solution for these people.
First, Aereo sets up clusters of miniature antennas in an area. When you sign up for the service, you are assigned two of those antennas. One is for watching live shows and the other is for recording programs. Your local OTA shows are then streamed to a cloud-based digital video recorder (DVR)-like service.
Aereo is planning on expanding to 22 new cities in 2013.(Including Detroit)