usually multi monitor setups do have a curve to them, so make sense that a extra wide monitor would have a curve, back to the point TP4 knows his stuff when it comes to screen, may be a bit over the top but you can trust his knowledge of them.
Although too much curve can be a thing depending on where you sit, if you are way far away you may not want curve, but that is not a typical PC use-case.
Speaking of screen anyone knows if there was a thin hi-res 4:3 screen ever made, i liked 4:3 for reading web pages and code?