With 1 Gbps, I think it will be similar. We'll see websites with components that wouldn't be possible without it, but those components themselves (uploading photos of your drunk college friends) were possible to some degree beforehand.
I don't think it will be a radical transformation where suddenly doctors preform robot surgery as envisioned with things like Internet2, but I could see, say, more Skype meetings with your doctor as the video quality and sound quality increase.
Forget Street View, we'll have Street Camera, maybe always-on connection to Google Glasses? (I think there were several sci-fi books on the subject).
There are already many obsessed bosses connecting to work even on their holidays, maybe now they'll own a telepresence robot.
I'm sure there'll be a lot of good uses :) but the current mindset makes me think of these possibilities first.
Look at how fast computers are these days. No one (except gamers and professionals) have needed faster computers in 5 years. Once we all got fast dual core machines with 4GB ram it's pretty much all been gravy. Mobile devices are starting to reach that level now.
I don't doubt that there will be some very compelling applications for gigabit speeds, but I don't think it will be a revolutionary thing.
HDMI will be a thing of the past because you will be able to transfer the highest quality audio and video over the Cat5/6 cable including internet data.
Movie Theaters could be democratized if you could view movies over the cable allowing those wanting to start a theater to have direct access to new movies via a subscription model.
Audio/Visual is where it will be - I can see it as clear as I can see this laptop in front of me.
There's a project out of Canada called Scenic & Scenic2 that currently uses Internet2 to do this: http://code.sat.qc.ca/redmine/projects/scenic2/wiki