"It is anticipated that the pool of unutilized IPv4 addresses will be depleted approximately at the end of 2009. This would imply that the Internet would not be able to continue to grow as easily as it has been growing and that it would become more difficult to incorporate new users, devices, services, applications and generally speaking, the innovation in Internet. In addition, it would also increase software development costs and, therefore, the costs associated with the use of the Internet for new services and applications.
The deployment of IPv6 is essential to avoid reaching this situation, and it is the only solution to IPv4 exhaustion that we can qualify as practically permanent."
Jordi Palet
