There are my idle thoughts on the matter:

I have also caught the nostalgia bug, but I suspect that in the future we will come to see this as a bug in people, not in technology. And, eventually, I suspect that we will "fix" that bug, for better or worse, by more tightly integrating our consciousness with the hyper-reality which we have created.

In the end, we won't have evolved beyond the online world -- we will have evolved beyond the "actual" world, or put another way, we will have evolved beyond the human sentimentality that values reality over hyper-reality.