No it isn't. It's just different...and highly specialized (see below). You get a few more pixels at an aspect ratio nobody actually uses. If you're after more real estate in terms of width, there are quite a few ultra wide monitors to choose from.
As I posted before:
4096x2160 isn't a standard resolution for any current application except as described below. The confusion (of end users AND manufacturers), and/or the marketing tactic of saying it is a "true 4K" monitor, stems from DCI 4K standards being a "Hollywood" acquisition resolution, so that a final cut can be delivered scoped at 4096x1716 (2.39:1 aspect) or 3996x2160 (1.85:1 aspect). Note that either the full horizontal or vertical resolution is used, depending upon the desired aspect ratio to be displayed when shown. Therefore, there are cameras that generate 4096x2160 video, which is intended to be CROPPED when projected, but I have not yet found another use for 4096 rez (as opposed to 3840) except for the TINY amount of real estate you gain on either side of the monitor. It’s good for visualizing DCI 4K footage and not much more as of today.
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Finally someone gets it.
I think if more people were actually using these UHD or 4K displays for actual video or photo editing they would realize that there really isn't much practical difference between them.