What bitrate are those "1080p" videos at? Oh, I thought so.
Imagine having that 1Gb connection. Imagine that you can't use it all but that you can do anything you want with it. do you think maybe you might sit down and ponder, that you might try to imagine better ways to use it? Cloud backup service is obvious and done. Video is done and being done. Keep going. Just sit and use your imagination and I suspect that you will eventually think of something new that cannot be done now with existing normal bandwidth. Maybe it's something silly, maybe it's something crazy, maybe it turns out to be something life changing.
THAT is why we need to have bandwidth well over and above what we have now. We need to have enough that people sit down and think up new ways to use, innovate, maybe find a way to save a life or help another. We've done this with CPU and GPU for a long time, disk space too. My first HDD was 40MEG and nearly the size of a shoebox. Suppose way back then someone had spoken as you have and decided that we would never need more and was listened to. We need to bring fuel for dreams and imagination - right now we're WELL behind the curve for that...