Microsoft will be a mjor force behind a big push from IPv4 support to IPv6.
This from a post on the Windows 8 Development Blog.
“Windows 8 is connected and ready to use, and our support of IPv6 is a key part of ensuring that connectivity for years to come. Because IPv4 wasn’t designed to handle the scale of connectivity today, the Internet is undergoing a radical change in its foundation. Every connection to every website, every multiplayer game, and every video call will gradually move to IPv6,”
In addition to Windows 8, Microsoft will also start to integrate IPv6 support in other Microsoft services like Windows Update.
Microsoft support for IPv6
Mashable have a good summary about the Ipv4 vs Ipv6 issue:
The Internet has run out of Internet addresses… sort of. Perhaps you’ve heard the news: the last blocks of IPv4 Internet addresses have been allocated. The fundamental underlying technology that has powered Internet Protocol addresses (ever seen a number like 188.8.131.52 on the web? That’s an IP address) since the Internet’s inception will soon be exhausted.
A new technology will take its place, though. IPv4′s successor is IPv6, a system that will not only offer far more numerical addresses, but will simplify address assignments and additional network security features.
You can read more about this here.