Re: @Len - That's pretty easy
"Pv6 may be complicated, but it is the only address system designed for the volume of addresses that will be needed."
Bollocks. 128 bits was way overkill. 2^64 is twice as many grains of sand as there are on earth so 64 bits would have been more than enough even divided into subnets with the resultant network addresses being far more manageable and the address itself being able to fit into a 64 bit integer with the resultant faster processing in the CPU and NIC.