Going back to the original point discussing the 'impact' of V6, the plain fact is that it will have no relevance at all to domain names as most of us know them. All the boffins are doing is adding two more 'most significant' bytes to the addressing scheme, something that is as simple to the programming community as a walk in the park is to a marathon runner.
This is no big deal at all other than providing more IP addresses. So the space will run from:
HEX: FF.FF.FF.FF.FF.FF
DEC: 255.255.255.255.255.255
If you do the maths, that's a LOAD more IP addresses. Should last until they realise they might as well have made it 8 bytes which would be enough to serve the earth and a colony on Mars.