Countdown to IPv6
From Ars Technica
A week ago, we reached the magic number of 2.7 billion IPv4 addresses used. With 3.7 billion possible addresses,¹ this means we now have less than a billion unused IPv4 addresses left.
….
In other words, unless something unexpected happens, we’ll be out of IPv4 addresses at some point in the neighborhood of 2012. So when the next Olympics come around, it’s very possible that some of us will have to watch them online over IPv6.