IIRC, there are already companies doing this in the mobile phone space. In essence, they beam steer using slight differences in the arrival time of the signal to actual antennas which in turn causes constructive interference in the desired direction and destructive interference in other locations. For mobile phone networks, this is only for azimuth. For systems like the ones used for AEGIS (the SPY-1 and variants) you get azimuth and elevation beam steering.

Honestly, I can't see this working without stepping on some of the patents owned by companies like ArrayCom and others.