Well, what about foldable phones? The current iPhone is too long to fit in my pocket comfortably. I would upgrade to a foldable iPhone.
Another idea: support hover gestures as seen in this article: https://www.theverge.com/2016/5/5/11595564/microsoft-3d-touc...
In software, get rid of flat UI. No need to bring back skeuomorphism, but find a middle ground.