Given that IPv6 is a good thing(1) any technology change that brings forward the time line for IPv4 address exhaustion is a good thing.
It is human nature that people don't do things that sound like hard work until they have to, and the continuing use of IPv4 with NAT and other hacks falls firmly into that camp.
(1) Every device becomes addressable again - I remember when it was normal to assume that devices could be reached directly, and would be fire walled if required. That led to a much greater number of people running services from their machine. From the perspective of a startup the idea that a client can run data services without some horrible <nat-related> hack is really interesting.
