The renders are based on the specs leaked by industry insider Jon Prosser and depict the foldable iPhone featuring an inner display that consists of two hingeless screens similar to the Microsoft Surface Duo design. Artist theHacker34 also lists some specs that are probably on his wishlist, as no other source has mentioned some of these.
https://www.notebookcheck.net/Artist-envisions-the-iPhone-Fold-in-detailed-animated-renders.494604.0.html