Samsung says they've made a wireless breakthrough

Samsung says they are running high-frequency wireless connections at 1 gbps and suggests that this technology could form the basis of commercial 5G networks by 2020.  That sounds good, but on second thought it raises a lot of questions, like:

• How is power consumption?
• What about our lame data caps? Will you hit your cap in the first hour of the month?
• What about backhaul from those gigabit towers?
• Don't high frequency signals attenuate rapidly as one moves away from the antenna? How many base stations will have to be added?
• Aren't high frequency signals more readily absorbed by obstructions?
• If implemented, how well would this technology compete with WiFi, especially if Google or others were to deploy it widely?

Can you think of other "how-abouts?"