Indoors the problem changes. Nobody is fighting the sun, so brightness stops being the headline and the format starts to matter: how the display sits in the fixture, whether it disappears when it is off, whether a customer can touch it without a visible bezel getting in the way.
Mirror touch kiosks read as a mirror until they light up, which is why they work in changing rooms and hotel lobbies. Bar-type modules fit shelf edges and counter fronts where a normal 16:9 panel simply will not go.