They are hard to do right though. I used to compete in combat robotics and the stresses put on museum exhibits is higher. I tell my new engineers that if their exhibit can be dropped into a gorilla enclosure and survive, they are about half way strong enough. Little makes up for raw experience in the art of building bomb proof exhibits, and many companies have failed before getting good. The amateur hour exhibits from the low bid newcomers that inevitably fail and/or need a lot of expensive maintenance has left a sour taste in a lot of museum’s mouths. A lot of those museums have knee jerk reactioned the opposite direction to touchscreen exhibits, only to see their ticket sales slowly drop. Thankfully, i’m seeing the pendulum of the industry swinging back towards physical interactives again.