I'm not 100% this is true, but with multiple antennas, you can do beam-forming. The basic idea is that you can use interference to point the wifi signal at devi

I'm not 100% this is true, but with multiple antennas, you can do beam-forming. The basic idea is that you can use interference to point the wifi signal at devices that are using it heavily at the moment, boosting their signal and thus their speed.