Hardware

1gbps is still perfectly fine for most domestic applications and office work, and it is still 1:1 with most domestic fiber optical internet access available today at a reasonable cost.

You "can" find a use case, like downloading a 140gb game in steam faster, using a 2.5 or 10 gig connection, but you will need good luck finding an ISP at a reasonable price.

Most streaming services will never stream high bitrate content because of the networking cost, and AV1 will save even more bandwidth in the future. So we will be fine in that regard.

Professionals who work with 4k raw video probably use Thunderbolt 4 storage solutions.

The only use case where 10gig makes sense imho is in larger distributed teams working collaboratively in video projects, where you need a 10Gig NAS, a 10gig switch, and 10gig NIC on every single workstation.