It'd definitely be interesting to see the affect on the foldable market if Apple releases one.

I'm still skeptical on that happening though. I don't think the screen tech is ready for an Apple quality device yet, and Apple is historically very into device separation - they try not to blur the lines between their products. iPad will never be a mac, macs will never have touch screens, I have a hard time seeing them making a phone that effectively becomes an iPad mini.