"I could try to explain, but I don't know how much background knowledge you're missing."
"All right... start from paper, I've seen that here. From paper you get to books, right? Okay, now say there's an artifact that's like a library in book form - it contains the information of hundreds or thousands or millions of books, and you can cue it to show you the ones you want, one page's worth of display at a time. And you can write on it, record new books into the library. And any two of these things can talk to each other, swap books back and forth. And there's a semi-centralized network so you don't have to physically find the exact one that has the information you want, you can just go on the network and find it from wherever you are. There's a lot more to it, but that's the basics."
"The ways it's better are harder to explain. But one example is it doesn't just do visuals, it does audio. Whatever music or sound you want that somebody's put on the network, you can get."
He goes for things that are simple, minimally flashy, and afford reasonable freedom of movement.
"Interesting. Do they tend to specialize in one or the other or whatever comes under 'and so on', or not?"
"Heh. Yeah, we've got heavily controlled painkillers too, just not usually made by the same people who make hair dye."
"Very different skill set. No magic involved, I think that's what makes the difference."