IPv6 is not really used much yet as quite a few ISP do not really fully support it yet. But they will need to do so very soon as IPv4 is getting depleted very very fast. Since this is getting depleted fast, there's no way of replenishing them so a new method needs to be introduced which is basically IPv6.
Perhaps right now, there's not a big demand for it but in time to come, you will notice that there will be more and more people wanting it and using it as a replacement to IPv4.
Personally, I don't really see IPv6 picking up anytime soon. It would take at least1-2 years before most if not all ISP to enable IPv6. This is something which is not easily done by them before it is costly and all.