I guess nobody responded due to no one having a curved screen yet.
I'm responding based on my experience with Samsung 39" regular full HD TV setup as PC monitor. It's flat and placed 3 to 4 feet away - at this distance the flat screen is great.
I'm not sure if a regular 39" full HD screen is physically wider than the above mentioned 34" curved monitor. If it is, I'll imagined your sitting position need to be way closer than 3 to 4 feet away to make use of the curvature. And you do need to sit closer due to it's higher screen resolution.
Perhaps a comparison at the store (39" - 42" regular HD vs the curved 34" monitor) will help your decision. And you can sum up the cost of 2x regular HD monitor (either 27" or larger screen) and see if it's cheaper ?
I'll imagine the curved monitor shall appeal to gamer that sits real close to the screen.