I use a 39 inch Sansui flat panel 4K TV for my work station monitor. 4K means the monitor has around 4,000 pixels of horizontal resolution. I could go into detail explaining 4K vs 2K or 1080P but it really would be simpler if you went to your favorite search engine site, mine is BING, and entered 'what is 4K resolution'. 4K is really quite nice when you have a 4K source. These TV sets make great work station monitors and are relatively inexpensive. I believe I paid like $200 for mine on sale at BJ'S a couple few years ago.

I would probably go for a Dell UP2716D because it is 100% Adobe RGB whereas the U2718Q is only 99.9% sRGB.
Although whatever monitor you select should be color calibrated the fact that the 2716D comes from the factory already calibrated to 100% Adobe RGB means you can maybe get away without calibration and still have a pretty good monitor.
And I know they cost a lot more.
I use Dells 32" equivalent of the 2716D and would never go back. The Dells are the closest you can get feature wise to the really professional Eizo and NECs.

Your choice is a great one!

Here is a review for it that is thorough and provides hard data.

http://www.tftcentral.co.uk/reviews/dell_up2718q.htm

One thing to keep in mind is that this display, like the ones that cost 6 figures, has the capability to be hardware calibrated, and requires an Xrite i1 Display Pro, at the minimum, to build a profile. All displays require profiling on a regular basis, since settings drift over time. I do my displays every 30 days.

https://photographylife.com/how-to-calibrate-your-monitor

The Dell is a graphics monitor. It boasts 100% sRGB and Adobe RGB - standard and wide gamut respectively - and benefit from a workstation graphics card that can output 10 bit graphics, and an application, like Photoshop that has a 10 bit (30 bit color) mode. The two choices these days are ATI Fire Pro and Nvidia Quadro. You don't need a high end card with a fast processor and 10 gb of video ram. A low to midrange card with 2-4 gb vram is more than sufficient. Computer displays offer DVI, Display Port and HDMI connections, each of which has greater bandwidth so they are preferable to VGA or Component, which is what is typically available on a TV.

A tv or computer display that has 4K resolution will have a screen resolution of 3810 px horizontal and 2160 px vertical resolution. I prefer to use 2 HD resolution displays because my horizontal resolution of the two displays is the same at 3840, but the vertical is still 1200. The result is fonts that are larger and easier to read. Not all applications offer font scaling and scaling in the operating system is imperfect. Color depth is more important than resolution.

While the notion of using a 4K TV seems like a good solution at first - especially since the price is attractive. But I wouldn't recommend it. Color depth, lag time and resolution can suffer, depending on how you connect your computer - VGA being the choice of last resort. If your computer offers HDMI output, then you may be ok. But then there is color gamut and bit depth that are specs often not provided in the printed materials for TVs.