I never, ever want to worry about where my GB's of photos and music and videos are again.
I'd run my own black-box recorder in my car, which would auto-sync all my trip data - including video - when I got home.
I'd run CCTV around the house and stream the data 24/7, at high res so faces would actually be recognizable in the footage.
I'd expect the strain monitors in every joint in my house to be recording their levels with the cloud based application which will alert me anytime any reach unacceptable thresholds.
I'd except my radar-based climate control system to be able to tell me the air temperature and wind velocity of every single cubic inch of air in my house over the past week, and compare with trends over the last year by looking at my cloud stored data.
Finally, I'd be able to prove to my wife that yes, I really did say I'd be late home from work tonight by playing back that "conversation" we had where I yelled "Oh yeah, I'll be late home next week" when I was walking out the door a week ago :)
Right now I use video mostly for talking to remote family members, but a high quality telepresence to "be in" a remote conference room would be great.
but really most of my web use only needs a 1mb line; read blobs, check news, look at pics, very little video.