Still, as much as I'd like it myself, I can't imagine there is any push at all from consumers, and very little from prosumers. I guess it's a bit of a chicken and egg thing.
It's not every day you need multi-gig, but it is very nice when you do end up doing something big that hammers your network hard. You do need to be serving from a SSD or a NAS, neither of which are particularly unusual anymore, but I guess for most consumers they don't really work with "their media" at all anymore, everything has transitioned to the cloud for average consumer. Everything is streamed, and if you want to back up a steam game or something, you just delete it and re-download it if you want it later.
Bet that kinda sucks for people in Canada or australia on super limited data caps though, it's kind of a weird US- and euro-centric perspective.
As a prosumer, it's a bit of a mentality change, but for things like photo or video editing, you don't need to have tons and tons of fast storage on your local machine, you can push it off to to your NAS and just manage it like the rest of your data, which is a huge convenience thing (in terms of backups, and in terms of capacity). 4-drive or 8-drive NAS can push a ton of data even if random isn't quite as fast as a SSD (and that's why files get cached in RAM anyway).
What?!? I live in Canada and have not had a data cap in over 10 years. They might exist for some ISPs but they are generally high enough that I've never heard anyone complain or get charged.