It just kinda makes no sense to me. How can you improve the framerate by predicting how the next frame should be rendered while reducing the overhead and not increasing it more than what it already takes to render the scene normally? Like even the simplistic concept of it sounds like pure magic. And yet… It’s real.
the ELI5 would be that frame generation skips a lot of the graphical calculations for geometry and lighting and so on and instead bases the generated frame on the pixel data from the real frames before. For every real frame the calculations must be done.