It's happening, get over it
Whether you like it or not, there's an increasing IPv6 deployment trend easily visible here. OK, so it's "only" just over 4% today, but that's doubled in less than a year.
https://www.google.com/intl/en/ipv6/statistics.html
There's certainly been a good amount of dogma on all sides of the argument, but that's nothing new in the world of protocol design. IPv6 deployments are increasing and one way or another the problems mentioned by other posters are going to get solved, even if some people have to swallow previously heretical solutions.
Is anyone really still arguing that we should forget IPv6 and continue with RFC1918 and NAT-PT FOREVER ??