Great strides could be made if Google, Wikipedia, and other major destinations had a day where they displayed a box to non-IPv6-enabled visitors telling them to contact their ISPs and ask for IPv6 and explaining why.
Great strides will be made when the cost of each IPv4 address rises significantly. That's when you'll see real progress, though not necessarily in the right direction.
If only there were sites / protocols that everyone wanted, which could only be reachable by IPv6. Maybe a new file sharing protocol, which uses the vast IPv6 address space to hide better, or something like that.
LTE is in large part about IPv6 (with the aim of using the PS IPv6 net to move all audio/video longer-term), often with carrier-level NAT for IPv4, simply because unlike the incumbent telecos, many mobile operators simply don't have many IPv4 addresses and there isn't the pushback against carrier-level NAT on mobile.