Throw in a 9" folding screen; device runs iOS when closed & iPadOS when opened, Apple Pencil Pro support on either screen; basically the outside is an iPhone Pro Max, and the inside is an iPad mini Pro...
Give it Stage Manager and allow it to use an external monitor as a secondary display; who knows, maybe even allow two external displays alongside the large internal iPad mini Pro folding display...
I would have a Pencil Pro, a Watch Ultra 2, and a set of AirPod Pro 2 earbuds paired with it; and when I plop down on the couch, a keyboard/mouse/display would be on a swing-out arm, and a large screen TV, both would be running from the folding iPad mini Pro...