Put yourself in the mindset of a typography geek. Then, by default, you will care about almost all of these things. I'm not saying you should care about all of these things all or most of the time, but that's the correct mindset to put you in sync with the author's conclusions (mostly -- I don't really think 120Hz is that big a deal).
The second and third monitor recommended in the article have 4ms latency, so there's essentially no reason to buy them.
There are good 4k 120hz monitors with strobing for way less than the $2000 mentioned. E.g. the zisworks kit for Samsung U28H750 (first available already in 2017): http://www.zisworks.com/shop.html
IMO 120 Hz monitors are overrated for pretty much everything except for FPS games (and similar fast-paced interactive titles).
I have a 144 Hz display and I would not want to go back to a 60 Hz display for gaming. At some point, my monitor changed to a 60 Hz refresh rate without telling me after some driver update. The first time I played Overwatch after that happened I could immediately tell that something was wrong, since the game just didn't feel as responsive and smooth as it usually does.