The problem will solve itself when the price of an ipv4 address becomes prohibitive. Either that, or telcos will see ipv4 addresses as a valuable source of revenue and intentionally drag their feet. And then the internet will die.
The reason that IPv6 has seen minimal adoption so far is that the market has no reason to care about it yet. When will it start caring? 541 days from today, give or take. That's when IANA is projected to run out of IPv4 addresses. It is not the day that the internet goes up in a puff of smoke if we haven't finished deploying IPv6; it's the day that market pressure begins to accumulate and the day we find out what an IPv4 address is actually worth on the open market. When it becomes cheaper for large consumers of IP addresses to transition their networks to IPv6 than to continue paying for IPv4 addresses, that is when the "magic moment" will happen.
When you understand that, the sluggish rate of deployment goes from "What the hell?!" to "Yeah, of course this has taken time!" In fact I'm sort of coming around to the "what were they thinking?" point of view and beginning to think that IPv4.5 (IPv4 + bigger address packet and minimal changes to make that work) may yet have been a good idea. "Everybody" said "hey, we have to have a new protocol so let's like design it to be the awesome!" but it remains to be seen whether the problem of "running out of addresses" can actually carry the weight of all the other wishlist that has been encoded into IPv6. (I'd say "probably yes, but it was closer than it should have been".) Reminds me of some of the (X)HTML standards that basically failed for the same reason... "well, as long as we're rewriting the standard language of the web, let's go nuts and embed all kinds of stuff..." unto death, as it turned out in XHTML2.0s case.
I just hope the current attitude of Cisco is proving me wrong.
The stakes are very high. A centralized network provides huge opportunities for analysis and targeted advertisement (read: spying and manipulation). IPv6, by providing an internet address to every device on this planet, is a threat to that model. However, clinging to that model is not directly making money from IP addresses, so the ICANN may not be able to do anything about telco dragging their feet.