Mobile definitely seems to be leading the way. I know the pace of obsolescence may be slowing a bit, but I still suspect that most consumer cable modems and routers will be replaced within a decade, similar to the pace of 802.11n adoption. It is troubling that ipv4 only ones are still being sold. So many negative comments here, but I still believe ipv6 will be rapidly adopted in the coming years and that all this concern about carrier NAT and the depleted ipv4 address space will become irrelevant in short order.