Re: what is the point?
Future of the web is the point.
Faster streaming videos
TV on the net
HD movies on demand
All your apps online, with no delay when editing docs, photos, videos, whatever due to painfully slow connections (though this does mean moving away from the current asymmetric nature of broadband). Key to the likes of Google to offer an online desktop OS for example. YouTube et al also where you could directly stream your videos and have them edited online (shared editing even), rather than using a powerful PC and very expensive video editing software.
Online/offline backups without having to wait for days.
Play your media anywhere in the world, fast.
Plenty of uses for home working where fast connections are a must to make it more like actually being at the office where you normally have 100mb+ networks and need to transfer a lot of files about, work easily on a lot of source code without having to use portable drives or remote desktop into a PC/server sat in the office running 24/7.
And plenty of stuff to support the bloat that goes with Web 2.0.
i.e. it's not just about big single downloads such as "linux distros" and pirate music/movies, it's about speeding up the net to allow us to do so much more.
Not that I hold out much hope for Fibre Britain. It'll be limited to a few places in big cities close to exchanges (and don't for a minute think that fibre solves connection hassles we have with copper over long distances).
And then what of cable companies? Despite what Virgin currently claim in their misleading adverts, their cable is *NOT* true fibre. It's only partially fibre. Much of it, including the stretch to the home, is coax. Very badly maintained and designed for analogue cable TV in the early 90s, not broadband, hence why their ability to provide a decent signal is so crap!. Hell, their coax stuff is broadcast based much like old coax Ethernet, sharing your data with your neighbours and all the traffic collisions that go with it (not to mention signal leak due to unterminated connections).