It may also be a point that newspapers are generally available everywhere, whereever they can be purchased. This means all you have to carry with you to gain access to one is the money required to buy one.
In my mind any type of replacement would have to retain this kind of spotenaity of action from the user.
I don’t know about anyone else, but I don’t get a newspaper delivered and generally don’t plan on when I am going to buy one. Therefore any device would have to be small enough for me to carry anywhere without noticing it, yet difficult to forget. Something that would easily fit inside my wallet maybe?
I think you’ve set yourself a dificult challenge and I look forward to seeing what further ideas you come up with.