Djghost113321:9 monitors at 3440x1440 under 34" don't exist, and 24" 16:9 monitors at 1440p are still very expensive, so I doubt manufacturers will be making 29" 21:9's at 1440p any time soon, if at all.
I had the same reservations before buying coming from a 24" at 1920x1200, but it's a very similar pixel density to a 16:9 1920x1080 at 24" and a great entry into 21:9 for the price.
What you don't want is a 2560x1080 at 34"