Maybe I'm an outlier but I'm old enough, and I think the phone/screen thing is a fad. The moment more natural peripherals become usable the screen will go the way of the landline. (I mean things like AR in your contact lenses, input through gesture and dance via "wearable" sensors, holographic sound, and so on.)
I think you're also going to get colonies of non-tech people. (The Amish are among the best farmers in the world and have large families. They are the meek who will inherit the world, eh?) There may arise small towns and enclaves that are retro-tech as a way of life.