One, the most obvious, is actually having distributed net and serving content from your own machine and in the ancient times like 15 years ago Opera tried that by bundling sort of local http-server (?!, can't even remember the name of the project…) but it floped... I'm not sure that ipv4 was the issue or rather the fact that people don't usually have or want their machine work 24/7...
for calls we have to rely on STUN/TURN but than again some consider this a feature as it hides external IP... which with ipv6 would be even more privacy invading?
I’m hesitant to suggest specific use cases because general purpose technologies are hard to predict in their applications. I doubt whether anyone accurately forecasted the impact of JS in the browser, for example.
However, I’d love to be able to interact with my car, CCTV cameras and other IoT devices at long distance with fewer middlemen involved.
I don't see significant difference for most private people. I guess the median has three phones, a tablet and a tv box, there's not much scope to improve the network for that use case.
But IPv6 makes a difference for some other situations. If you operate a network with routers and such, it makes sense to have all connections to internal services use IPv6. Backup, file storage, databases, management interfaces, blah: Give everything its own IPv6 address, don't accept connections on IPv4, and allow IPv4 packets from 192.168/16 only to the outside world.
One, the most obvious, is actually having distributed net and serving content from your own machine and in the ancient times like 15 years ago Opera tried that by bundling sort of local http-server (?!, can't even remember the name of the project…) but it floped... I'm not sure that ipv4 was the issue or rather the fact that people don't usually have or want their machine work 24/7...
for calls we have to rely on STUN/TURN but than again some consider this a feature as it hides external IP... which with ipv6 would be even more privacy invading?