In 2020, Edge Clouds can reduce latency to about 15-25 ms in 5G, ~10 ms more in LTE. Today's 4G LTE networks take 30 ms to 70 ms and more. Everything we do today works on 4G, of course. Some apps will benefit substantially from lower latencies, especially gaming. Some new apps will develop when lower latency is available. Multi-player Pokemon looks great.
To write Strategies for 5G, I needed to understand the impact of Edge Clouds. The first half dozen experts provided me with about seven opinions, often conflicting, They couldn't even agree on a definition. After a month of research and two dozen more conversations, I am less clueless. I divided the different Edge proposals into five levels.
Level 1 will require 1 ms 5G air latency, which is still in the labs. The 5G deploying is about 10 ms.
Level 2 is close to the cell, which adds 5-10 ms to the air latency. The first unit of the type is now installed in Chicago by Vapor IO. They promise nationwide coverage by 2020.
Level 3 is further back in the carrier network and a little slower. Deutsche Telekom's system, mostly constructed, expects 20-25 ms. That's the supply side.