the more interesting question to me is: what can we, ops and ietf, do to make it operationally and financially easier for providers and enterprises to go to ipv6 instead of ipv4 nat? carrot not stick.
The problem is, the only way to make it easier for providers and enterprises to switch is to make it less scary looking and less complicated sounding. That door closed when it was decided to go with hex and 128-bit numbering. *I* know it's not nearly as bad as it seems and why it was done, and their network folks by and large know it's not as bad as it seems, but the people making the decisions to spend large sums of money upgrading stuff that works just fine thank-you-very-much are looking at it and saying "Ye gods... I sort of understand what IP means but that looks like an alien language!"
At which point the ugly duckling gets tossed out on it's ear before it has a chance to become a swan.
sorry, i am not interested in the marketing and glossy paper crap. and your dissing isps and enterprises is a part of the problem not part of an approach to a solution. this reminds me when one of the ietf ivory tower fools said (during the TLA?NLA wars), and i quote, "the HD ratio will not work because operators do not understand logarithms." and he still stands in the way of useful progress. randy