If I may, read my prior post. You need the 42-inch display a bit more than arms' length away from you, when your arms are fully outstretched. So maybe 15 to 18 inches away. It sounds like a lot, and you'd think it wouldn't work -- but it does, beautifully. Because everything is crisp, clear, and
large. I'm never going back. I do have a large desk, it's got around two feet of depth, everything sits behind it. But you could pull this off with something smaller.
So, input lag and response rate. OLED is by far the best display tech concerning those items, you can read lots of reports or view videos about that, or go to /r/OLED_gaming and they will have
tons of info (I don't game, I use it for specs and settings).
Here is one video report concerning why OLED is the fastest tech by far.
Another key thing: all these OLED TVs come with an HDMI "PC" setting. Whatever port you plug your MacBook/Mini/Studio into, you select that TV HDMI port, and you tell the TV the HDMI port is connected to a "PC."
Here is how you set it up. And for the latest LC C3, here are
additional settings. That enables ultra-low input lag and increases chroma, among other things, for the best input speed and result.
LG knows tons of PC and Mac users, as well as console gamers, are buying their 42-inch OLEDs. So it also comes with a "game optimizer" panel which can do all kinds of things, including Variable Refresh Rate, further fine-tune input speed, adjust black levels, blue light, etc.
These OLED TVs, if you have the space, are absolutely killer monitors.