The fact that's it's just 15 seems to belie this. I would expect Apple to re-brand once something truly different comes along... that being said all smartphones are becoming long and in the tooth and we're finally starting to see inklings of what might replace our phone addiction in the near-term (audio (buds) + vision, eyeglasses etc.)

It's always the greatest iPhone ever! https://www.youtube.com/watch?v=bPkso_6n0vs

The highest number in Apple version history ever! Wait for it …… after last highest 15, we have … ……… 15.0001. Yes!