Maybe we don't even need 5G, there is plenty of mileage left in 4G, by the looks of it:
EE, Qualcomm and Sony, with its Xperia XZ Premium smartphone, partnered to show Gigabit LTE mobile broadband working in a real world UK environment today. During an event at Wembley Stadium in London - which EE sponsors - Pocket-lint saw the new Sony phone achieve download speeds of up to 750Mbps on 4G. Upload speeds are quoted at 110Mbps. The Sony Xperia XZ Premium is the first phone to be Cat 16 compliant, so is the only one currently able to make use of Gigabit LTE. It was hooked up to a laptop in order to show real-time download throughput via its mobile broadband connection and it did achieve stable speeds of between 600Mbps and 750Mbps.
EE and Qualcomm demo Gigabit LTE in the real world, speeds up to 750Mbps achieved - Pocket-lint
But 5G will come, and it will be even faster. In the end the tech doesn't really matter all that much, what matters is speed, latency, and what the tech enables in terms of new businesss models, like IoT.