“5G” is a marketing term.
The Next Generation of Wireless — “5G” — Is All Hype.
Susan Crawford

Not much has changed in a year and half:

``Here are the list of 5G ingredients if you take the 5GPPP vision; it will be a heterogeneous network (using multiple spectrum and radio technologies); it will in fact support three different kinds of traffic profiles, high throughput for video services, low energy for long-lived IoT sensors and low latency for mission critical enterprise services. Small cells will drift slowly towards Ultra Dense Networks.

And all of this will be on a single network, not some on WiFi, some on cellular and some on specialist IoT networks — no! Because if the cellular community doesn’t own ALL of it there won’t be enough money to go around. Public safety will be part and parcel of 5G too.’’