[yyyk]

In practice we'll still be traffic shapred on ISP level so not so much P2P. It's far more likely that IPv6 will be used to give everyone one single unique trackable address* and we'll all be easily tracked down by IP again. The practical semi-privacy IPv4 let people have will be gone.

Ultimately, technologies are less important than public opinion, politics and commerce in dictating how the net goes.

* Or a single trackable address range, no matter. Yes, ISPs could do differently. Why would they? All the incentives are on the other side.