A parallel protocol and hypermedia format that's restricted enough to prevent tracking isn't going to attract everyone. It's going to attract the subset of users who care enough about stuff privacy to give up "rich Web" features like single page applications and animated HTML canvas elements in return.
That's not a group that's likely to start immediately demanding to to build in the features needed to create infiniscrolling Pinterest feeds. And it's also going to be a much restricted group, meaning businesses won't stand to profit much by pushing for it. So there might not be any economic incentive to do it.
At least, that's how it might be at first. If it remains a nice place to be for 5 years, I'd call it a decent run. 10, and I'd be ecstatic.