These offerings aren’t your grandfather’s rabbit ears. Companies with high-tech, futuristic names like Nuvyyo and Mohu are jumping into the game, along with TiVo, ChannelMaster, Tablet TV and Simple TV, all of which are combining state-of-the-art digital antennas with over-the-air digital video recorders. New DVRs can snag content from over-the-air TV stations, the Internet and