Huge spans of the IPv4 range were allocated by large corporations during the early years of internet. These companies have now precious commodity to sell, and a market of 3rd party IPv4 address ranges will emerge.
This will maybe a stop gap for a few months or years. But that is it.
In short: You will be able to connect to internet by using your old Miami, AmiTCP or other "old" TCP/IP stack just fine. There's no hurry to get native IPv6 support.
IPv6 only sites will popup but is mostly likely to happen first in the Asian region. That is probably not that much of a problem for us in the Western world.
There is no urgent need and current web sites will likely keep their IPv4 addresses so current web sites will be still accessible; that is true. But people who don't get access to IPv6 in the coming years will gradually have access to a smaller part of internet. Some ISP may offer some IPv4 to IPv6 gateways to circumvent this.
greets,
Staf.
