[citation][nom]mman74[/nom]Most people might not see any real ptracical benefits over this and a decent ADSL line. For a start that kind of speeds will only be local with the ISP, so to get anywhere near that kind of 'nominal' speed, you are going to have to be moving files with someone local on the same ISP.That leaves your everyday surfing and content providers at this moment are no way going to be catering to that kind of band-width for you sole pleasure. So in reality unless you are sharing files with your neighbour a lot, you might not see any difference over regular broadband.[/citation]
I'm pretty sure if they sell you big pipes, they have to be able to supply those pipes. IANAL, but I seem to recall hearing some legal trouble over what an ISP can sell you vs what they can technically provide. Over-provisioning aside, I think they would have to at least have a gigabit connection into the local trunk.
The main benefit to this is going to be having very large up/down pipes to more than one place at a time. If you're like me and own a web server, big pipes in both direction are very handy.
Not to mention its also nice if you don't live alone, and more than one person wants to use the internet. Hulu tends to eat up our connection.