How about a display on the back? That way there would be (nearly) no wrong way to hold your phone.
You can only see one side at a time.
Unless you could unfold the phone.
But then it would have again a front and back... Unless... You don't mean they would add another two display on the inside back fold!? My god, quadruple displays!
Moebius strip computing to the rescue!
unless they go the Möbius route
I don't get why you'r downvoted. Here's my perfect iPhone: Retina display in the front, eInk in the back. As a bonus you can use eInk to 'skin' your iphone with your favorite art.