What? My ISP isn't giving me the latest version of the internet?
I still think getting a good meme going on the social networks that ISPs are holding out on their customers re: latest ' version' of the internet might work :-P. Get people marching in the streets -- we need to get out and exercise more anyway, so two birds, etc,etc.
Seriously, the extended address range of v6 is probably the least useful benefit of it - nice to have and all, but while NAT may have started off as an address-space-shortage workaround, it can be a very very useful part of network management.
My employer currently owns a Class-B range. They have little need for so many addresses visible from the outside world and in fact go to a lot of trouble to hide/block the internal addresses. A couple of class-C ranges (which they already have as well) and a NAT and they can hock that class-B for a pretty penny to an ISP or similar who actually NEEDS that sort of internet-visible address range. There may be no place like 127.0.0.1, but 10.x.x.x is where the institutional-buffalo like to roam.
As for my home - One static public IP NATed to my half-dozen services with a nice filter on what ports get in and where
The other improvements of v6 may be more broadly useful, even if they are less visible.