IPV6 had it's "glory days" a few years ago when the Internet was getting big and it appeared we were running out IPV4 addresses. That was a very valid concern for a while, but nowadays everyone is using NAT to connect to the Internet, freeing up a lot of addresses. For example, I work for a large company with ~60,000 users. The total "advertised" Internet space is ~4,000 addresses. (Even if we do own two class B's and innumerable class C's).
IPV6 will eventually come, but the immediate need that we saw a while back has passed.
- G