Seems like it will have even more issues than 4G for the end user. While higher frequencies naturally allow for higher data rates (e.g., without any special modulation, going peak to peak on a waveform will allow 1 bit of data to be transmitted. The problem is that the higher the frequency, the less it is able to go through objects.
The other ways to improve transmit speed, is to increase the complexity of the modulation e.g., modulating phase and amplitude in as many ways as possible. The problem is that when you do this, the effective range gets shorter and shorter, as it is more susceptible to noise.
What I am wondering is if they use a more complex modulation, will it have the same issue as 256QAM on WiFi, where companies advertise 1300mbit/s, but realistically the router will only hold 256QAM for about 6-10 feet before it has to lower the modulation.
Overall, how do they plan to deal with the ranged performance, and how do they plan to deal with the real world performance. 4G in the city is slow because of network congestion, 1000 times the wireless performance does not mean much, if the link going to the tower only offers like 2 gigabits of throughput to be shared by a few thousand people in the area.