It's not clear why the ultra-low-power devices hooked up to the "Internet of Things" would need 10Gb/s
Good, because they won't get it for long. That 10Gb/s will be for the entire cell so the device will be sharing it with anything else in that area. That's the nature of wireless internet and always has been. The proponents do so love to chuck out these large numbers then neglect to mention that what an individual device/user will get depends on:
* Number of other devices competing for the mast's bandwidth.
* Distance from mast.
* Obstructions between them and mast.
So at 3am on a lovely evening if your device is sat within 100 metres of the mast you might indeed get 10Gb/s. At 8pm on a wet evening, sat in a house or office in the centre of a city..not so much.
5G should be better than 4G but neither is going to live up to the hype.