In this paper, when considering wireless communication systems, future outlook regarding signal processing antennas such as adaptive array and MIMO system in next 50 years is discussed. At present, signal processing antennas have been incorporated as MIMO system into the commercial systems such as Wi-Fi and LTE and one of key technologies in broadband wireless communication systems. On the other hand, although the concept of adaptive array has been proposed in 1950s, adaptive array has not been developed as the commercial product in mobile communication systems. In this paper, the history on the research progress and development regarding adaptive antennas and MIMO system is surveyed. Next, developed technologies have been much attracted attention again for massive MIMO in next wireless communication system such as 5G system, and future prospect for next signal processing antennas is described.