I didn't say "imagine what you could do with it." I said what do you need to do that requires it.
Google fiber doesn't allow running servers as you describe.
Backing up data? Ever here of USB drives? Tape? Local media? You don't need to back up terabyte drives to the cloud -- there are plenty of viable, existing options for backups.
If you're going to share videos with families and friends, get a Dropbox account or something like that, upload the video, and use the cloud to serve up the data. Just how often are you creating hour long cat videos, anyhow?
People nowadays have a very entitled view as to what they "need".
As I said: spoiled. You never dealt with dial-up and resumable downloads that would take a week or more to complete. Everything for you has to be now, now, now, and instantaneously.
OMG! My game update will take 23 hours! I can't live without playing my game for a day!