Here is the way I view it. Depending on how sharp your eyes are, 1080p on a 30" at 2.5' away does not reveal any pixel matrix on the screen. If you are at a distance where you can no longer see a visual difference (size of pixel is relative to viewing distance, a constant) then it doesn't stand to reason that you should go for a more expensive display that also requires more horsepower to run it.
However, some people will still claim that they can tell a difference between 1080p and 1440p (The HP/Dell/Sam are 1440p when adjusted for correct aspect ratio - comparing apples and apples). And perhaps they can..
But, here is the question you really have to ask yourself. Is super high resolution more important than shadows, lighting and polygon count? If so, then you may be happy after all. And if you have $1,000 to spend on the graphics to run the display in all the glory, then you will also be fine. But that is going to be costly and only those with money to burn should go that route.
IMO I'd rather lower the resolution and crank up the shadows, lighting, polygon counts than vica versa. OF course, if I could have them all, I would chose that
