The World IPv6 Launch takes place on June 6, 2012. IPv4 addresses have run out, although workarounds exist, and new top level domains have been created. There's no easy migration path from IPv4 to IPv6. With the growth of M2M, IoT, and Smart Grid, the need for new IP addresses seems obvious. So, does anyone care? Based on book purchases, I'd say no. What's the next step?