Actually, I've just seen it. It is amazing!
'Estimates suggest London needs to provide housing for almost 100,000 new people every year until 2016 to cope with new arrivals and replace existing housing stock at the end of its life.'
So when will London be officially full??
I doubt if the new flats will be affordable, so it's not going to solve the housing problem - so they can stop pretending they are doing the public a service!
However, if it's a choice between building up into the sky or out into greenbelt land, they should probably go up. But not quite so high.
And it does look pretty spectacular (if you're not living next door, that is).