Arthur C. Clark once said "Any sufficiently advanced technology is indistinguishable from magic". What technologies do we have today that would look like magic to people from the past?
I think lasers are pretty wack when you think about them through this lens. A small, wand-like object in your hand can make light appear from seemingly nowhere. If it's powerful enough it can set things on fire or blind people. Not to mention larger ones like laser cutters or the LLD, used to destroy missiles midflight. Thats sure to blow some feudal peasant minds
It doesn't need to be super advanced to be incredible.
I usually have a live cam playing on my 2nd screen. Right now I'm watching a bird feeder in Panama, full of tropical birds. Or I can watch another stream that's in NY State where there are Bluejays and Woodpeckers. Sometimes I have a tropical beach, or look at the jellyfishes in the Monterrey Bay Aquarium. I think that's magic.