Following decades of slow movement due to cable companies facing no competition, the television world is changing rapidly. Lots of challengers have arisen in the pay-TV space in recent years. One of the latest comes from Verizon, which has improved its FiOS mobile app to offer data-free streaming. AT&T’s DirecTV started this ball rolling with its wireless TV, or mobile TV, offering. It forced all the major competitors — Verizon, Comcast Xfinity and Charter Spectrum — to strategize and pick up their pace.