Before everyone starts talking about how small the screens are, keep in mind the application. This isn't for gaming - high res isn't necessary. This would fit very well in a one-one training application, or for companies standardizing on dual monitors for their employees. I think it's a fantastic idea - haven't read enough on the costs, etc, to see how that would figure.
For personal use? Admittedly, yes, at least 19" would be good.