See the first version this decade of the Wireless Quarterly from Nordic Semiconductor. www.nordicsemi.com is the leading provider of BLE SOC(s), "system on a chip".
BLE is changing the game in all kinds of unique applications never before thought possible. Note also the release of BLE 5.2.
Commercial 4G LTE-M and NB IoT solutions are now hitting the market in a big way in 2020. The value of Cellular IoT is it allows almost anything to connect globally to the macro cellular network without having to deal with a middle gateway.
Over time Cellular IoT will change as 5G is released. However realized now 4G will meet the huge demand of applications as they hit mainstream in 2020.
