IPv6 only solves a problem if you don't understand the problem itself! Just because people have five devices doesn't mean they need 65,000 * 5 internet addresses ... there is an endpoint for every port and each device needs only a handful of ports if not only one! Each user can certainly get by with five ports on five shared ipv4 addresses.

As I said before IPv6 will never happen fully because it solves a non-problem very expensively - by assuming the whole world is 64-bit workstations!