ASUS has released the PB298Q which is a 29-inch widescreen monitor with an ultra-wide 21:9 aspect ratio and 2560 x 1080 resolution. The PB298Q features an AH-IPS (Advanced High Performance In-Plane Sw... ASUS PB298Q Ultrawide 21:9 Panoramic Monitor
Dell's version still has the advantage to link 3 of the displays together, only need to connect one of them to the graphic card.
Well, given the 21:9 ratio, only if you stuck them one above the other, otherwise i can´t understand how such large horizontal screens side by side present any good experience. One of these is a matter of personal taste i suppose, three is just silly.
This actually has less pixels than 27" 1440p, but is being sold as 29". That`s the big selling point here
Depends on what you use them for. For work it's pretty nice, since you as example can have 2 servers opened on each screen, like having 6 3/4 monitors, but still with the ability to use each as 21/9 display's. When we talk gaming, there is one issue ore that is present with every current triple monitor setup, with exception of the curved Alienware and the Radius 320. Bezels, I honestly can't stand them. So for me a single wider screen is fine, since those curved models still are way to expensive, not to mention that they only have 900 vertical pixels.