From what I've read about 5g is that it requires more antennas. Sure the bandwidth is better, but it needs a higher number of antennas for the network. Much like a wi-fi mesh network in your home.

Currently they use cell phone towers to triangulate what building a phone/person is in. With 5g they'll know not only what floor that phone is in, but also what room that person is in. Pinpoint location tracking without GPS.