I don't want to use some company's cloud service. I want to store my data on my own NAS. I do want the convenience of accessing that information from anywhere though which is what cloud services offer. The reason I can't do this myself is that there is no eco-system for private clouds. What would a private cloud eco-system look like? Well it would consist of some opensource protocols for syncing from any device and a fixed IP with some storage attached to sync to. But fixed IPs are expensive because IP4 addresses are minimal. So the killer app for IPv6, it seems, is the private cloud. IPv6 => lots of private fixed address => private cloud to sync data to.