I know why I´m telling this to you,
You can not apply to a company like Sony with something poorly developed as a demo, not even Epic does …
So it is strange that the engine is not ready for PS4, even to make a demo, because huge companies like Sony, as you said, they don´t wan´t everybody In, It would be wiser that UE4 already has that compatibility, and why not? If your game is developed for PS4, you are not going to do nothing with it, unless you are accepted by them… so why not to include those packaging options from the get go, no need to be afraid.