While it undoubtedly includes some BT self-puffery, it is interesting to see what is required to deploy the technology in large-scale, rather than when we just think of our own individual houses. 2818 apartments in 67 blocks.
Take a look here: Delivering London 2012: ICT Enabling the Games. Page 26.
There's also a fascinating article on getting dense mobile data coverage, detailing work at Twickenham as a trial. It isn't just as simple as making cells smaller
