I have always thought that the physicist 800 years from now, with get quite a kick out reading today's accepted theories. They haven't scratched the surface......
What's your point? That we will learn a great deal more in 800 years than we know now? Of course we will. Nevertheless, the writings of Aristotle, Galileo, and Newton are still in print, and we still read them with appreciation of how brilliant they were in their day. No one today, with our superior knowledge, snickers at their efforts. Most assuredly, no one in their own time snickered at them with the expectation that their work would eventually be superseded. I think the same is true of our scientific work today.