Why wouldn't you be able to clone the monitors so that there are two screens showing the same picture? MAME won't even support that? It wouldn't be the ideal setup for some 2p games, but it could work for a bunch of them.
I'm just envisioning maybe a back-to-back sit down cab with controls for 1p on each side. It would work for fighters and the like... the only games that would give it trouble would be multi-screen games that do not always have the same screen showing, i.e. both players can move to different areas, etc.
Those monitors look pretty cool, but my only question is why go with a 15" main screen? Understandably, they could put it out for a lower price, but it just seems a screen aimed, at least according to their site, at business people using spreadsheets and the like would want more screen real estate. Otherwise, that's a really cool idea.