You raise interesting points. I totally agree with #2 and maybe #4 on iPads. However, for a family with kids iPad is not that of a personal device. 😁
I agree less so with #1 and #3. I think typical iPad screen is still bigger than typical album photo, 5x7, I used to build. And my counter argument for #3 is that I am willing to suffer through the friction instead of adding another electronic device that will be used rarely.
In either case, good luck!