Does a 5G connection to iCloud or Amazon Photos or Adobe's cloud service not strike anyone as a significant improvement??
Instant transfer of images to a cloud based server sounds to me like a very useful feature.
That might also allow an iPadPro or other laptop to edit files in the field.
I understand that the full implementation of 5G will be ongoing for years, but according to Verizon the major cities will all have major 5G networks in the near future - 4-12 months or so. Indeed, the link below says that 5G UltraWide band service will be available in 60 major cities before the end of 2020. It also mentions that AWS - Amazon Web Service - is integrated with Verizon's 5G Edge business accounts...
I think much of the iPhones photography will be done near or within cities - and uploaded immediately to the web with low latency too.
As @DangerDave suggests, serious landscape shooters will probably use larger formats.
Phone photos tend to be of people, and what people are doing, so they will be near those 5G networks - just my thought.
I definitely like the idea of three cameras in my rear pocket all the time with immediate AWS access.
I have also seen some videos of using phone cameras for scanning film and negatives and some of the techniques work pretty darn good. Fast and easy too. They don't have to be an iPhone 12, but it wouldn't hurt if they were - again uploading directly to the Web or IClouid Photos.
Not having to use open hotel WiFI networks, but, instead, nice fast 5G secure cellular networks seems preferable to me as well.... Nor renting movies on a hotel TV when you can see them on your phone or tablet via 5G seems kind of nice too. JMO