The good news about any new technology is that if and when it becomes ubiquitous, we stop having to convince people it is a good thing. On the other hand, early expectations also tend to be inflated. So 5G "is a good thing," as gigabit home broadband is better than 100 Mbps.
5G will allow for easier creation of customized virtual private networks for guaranteed latency or bandwidth. But there will be other ways to achieve those values, such as edge computing or private networks.
The better way of framing 5G is whether mobile internet access is a good thing; whether remote sensors are a good thing; whether high-performance computing is a good thing.
But it is like any other form of digital infrastructure: what matters is why you might be able to do with it.
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