A con for me is the limited physical height. They need to get bigger imho.
No, perhaps I should..Have you seen one in person? They are really squat.
I got the one on offer from OcUK. Very different coming from a 27" 1080p. As Saleem said they are very compact height wise compared to a normal monitor but I'm kind of getting used to it.
Here's a quick mobile phone pic https://www.dropbox.com/s/79vdkm62ufvjpju/IMAG0043.jpg
It would be a far easier to setup and much easier on your gpu.Looks about what I was execting and considering it would sit out 10 inches behind the steering wheel, I don't want anything too large. I was considering 3 x 22-24" but thought this might be a much easier to set up and run option.