[versk]

It seems like you have a lot of misconceptions about cities and there health and environmental impacts, which have been proven multiple times to be lower in per capita then suburban and rural communities, often by great amounts. I'd like to understand why you think the decentralized model is more sustainable, It requires cars and roads to live outside the M25. Other comments have dealt with these numbers already.

Anyway, to my point. I see no reason why new technology and interconnectedness is going to lead to the decline of the western city. My Experience suggests its more likely to lead to a greater desire among young adults to move to the urban cores (as they always habe), for Sex/Marriage, Culture and Nightlife as they see there own friends partake, so to speak. At the end of the day, extremely few people would find the internet an acceptable replacement to living amongst ones peers