Having been on Virgin's fibre broadband at 20Mbits (yup, 20) for 6 months, while it is indeed very fast and so far, reliable, it is NOT fast enough. As soon as another occupant of the house beginds to watch an HD stream or download something, it slows down - sometimes even grinding to a halt altogether during busy evenings. Furthermore, with the advent of widespread cloud computing, considerable strain is going to be put on the Internet as a whole. Already, using Google Docs on anything but the fastest connection is impossible, with it timing out if the connection slows down too much. (Not Google's fault.)
For the sake of the economy, like the autobahns, highways and motorways of the past, the governments of today (Singapore has already done this) needs to build a super/mega/ultra/wikkedly fast national network of at least 40Mbits (yes, 40) with a 5Mbit or more downlink to make uploading content and teleconferencing practical. The ideal way to achieve this without digging up half the planet to lay fibre to the home will be to use 4G LTE wireless technology.
We MUST invest now!