Want to make sure your video monitor is displaying as it should? If so, you might be interested in Datacolor's SpyderX, a nifty tool by which you can optimize your display easily and quickly.
And it seems to work, though I'm no expert on such topics. But after having tried the Spyder X on my computer and even one of my flat panel 4K TV's, I'm confident to say the product does work well.
Why would you care?
Well, there's the pursuit of excellence, of getting the most out of the after-tax disposable income you've spent on your technology. And there's also accuracy, if you're a professional designer who uses colour in your work – if you specify a particular colour (Pantone colour standards etc., notwithstanding), you should do everything you can to ensure that what you see on your screen is exactly what you intended. Remember WYSIWGY?