I wish I was joking but take the current usage of the internet, and scale up each part. 1TB/s might enable new things, but it's more likely to enable more of old things.
Is the problem with video streaming really bandwidth? I thought storage was the bigger problem, so before storage doesn’t come down in price, it won’t change much, right?
A high quality 4k stream is about 20mbit/sec. 16k resolution would only have 16x the amount of pixels. Assuming bitrates scale proportionally to resolution, that would only be 320mbit/sec.
So if you want to max out a 1tbit connection, you would need something closer to 900k resolution.