I saw this mention of self-driving cars a couple of times in these comments. I'm pretty sure you don't want your self driving technology to rely on 5G connection, otherwise a sudden unexpected drop in connection quality (an antenna down for maintenance, an unmapped tunnel, an exceptionally crowded area due to a demonstration with lots of people streaming video, etc.) would also reduce the quality of transmission and maybe make the connection just impossible. What would happen in that case?

I think a "local" network-free source of computing is unavoidable, and once it is available, I just don't see the point of setting up a complicated (and error-prone) infrastructure to make computations remotely when it is available and fall back on-the-fly when not. Given the amount of regulation this kind of things have to comply to, and how error-proof they must be, I wouldn't think anybody would be happy with this cascade approach...