Things which currently blocked by not having 10Gbit internet (not saying that this is the only blocker):

- videocall with hundreds of people where everyone can see everyone else

- higher definition, extremely realistic VR

- instant transfer of gigantic files. I work as a data scientist and I'd love to just slack someone the result of a quick and dirty experiment on a 50GB dataset. It sounds ridiculous now, but it isn't.

- real-time collaborative editing of gigantic files (video, sound, tabular data).