My estimate would be that the 132 PPI of the iPad will some day be used for a larger iPhone.
Aside from the incorrect use of the term "PPI", there is no reason for Apple to retain that many points in width per inch at all. Nothing does even suggest Apple wants to keep a 16/9 aspect ratio.
Everyone can make up a number and have the related diagonal size at will.
I like the number 150 because it's nice and Apple like nice things. Let's post a thread about it, shall we?
You did a bit of high school maths and figured out Apple's future iPhone strategy? Go home OP, you're drunk.
Alex
You learnt divisions at high school?