lets welcome IPv6, You do not need to change your system if you bought your system in these recent years say 3 years back from now. Because Intel, AMD and many other brands of motherboards have already updated their IPv6 internally. Check the below picture you can see a protocol version named IPv6.
The Internet Society, an organization dedicated to the good of the Internet, is organizing "World IPv6 Day" on June 8 of this year. Web giants Facebook, Yahoo, and Google, with a combined one billion visitors per day, are participating by enabling IPv6 for their main services that day. But unlike during the IETF IPv6 experiment, IPv4 won't be turned off.
Technical information :
IPv4 address exhaustion is the ultimate result of the decreasing supply of unallocated Internet Protocol Version 4 (IPv4) addresses available at the Internet Assigned Numbers Authority (IANA) and the regional Internet registries (RIRs) for assignment to end users and local Internet registries, such as Internet service providers. IPv4 provides for approximately 4.3 billion (232) addresses, divided into 256 /8 primary allocation blocks. IANA's primary address pool was exhausted on February 3, 2011, when the last 5 blocks were allocated to the 5 RIRs.Asia-Pacific Network Information Centre will be the first RIR to run out of IPv4 addresses completely and this is expected to occur in mid-2011.
The depletion of the IPv4 allocation pool has been a concern since the late 1980s, when the Internet started to experience dramatic growth. The Internet Engineering Task Force (IETF) created the Routing and Addressing Group (ROAD) in November 1991 to respond to the scalability problem caused by the classful network allocation system in place at the time. The anticipated shortage has been the driving factor in creating and adopting several new technologies, including Classless Inter-Domain Routing (CIDR) in 1993, network address translation (NAT) and a new version of the Internet Protocol, IPv6, in 1998.