A quick Google search shows no particular shortage of 19" 4x3 touchscreen monitors for sale, in a variety of forms: Desktop, VESA-mount, open-frame, and 19" ra

A quick Google search shows no particular shortage of 19" 4x3 touchscreen monitors for sale, in a variety of forms: Desktop, VESA-mount, open-frame, and 19" rack-mount. (Other sizes were also shown to exist, but this was not an exhaustive search.) It seems like a thing that is unlikely to disappear soon, since a lot of industrial customers -- globally -- are very comfortable with rack-mounted displays, and 16x9 rackmount screens are kind of meh compared to 4x3.