ISPs are key
From what I can tell, all the major infrastructure is in place for IPv6. All the service providers I have looked at with regards to computing resources support v6, just consumer networks that don't.
I am with Zen, and their network has full dual stack support, and the router they provide for free to fibre customers is not only top-notch with regards to performance and features, but it also has full IPv6 capability with a couple of button presses without any faff. I don't understand how it is so hard for the mainstream ISPs to produce CPE that does the same!