I think 5G would be more useful in tablets and laptops. Only so much you can do on a phone.I would pay extra for an iPhone 12 without a 5G chip... its a useless, energy inefficient, gimmick, LTE was already fast enough for video streaming at 1080p, gaming, banking, whatever your bound to do on the tiny screen and software limitations of a smartphone.
If you want to professionally live stream the olympics in 4K from your fan seat you might as well bring a production crew and not depend on your phone, as good as it may be...