I tested a 4k Philips and the scaling was absolutely horrific, in any mode.
With Philips that would be expected. Sony and Samsung do well-enough, LG decently too.
A digital PC monitor will have blur. Make sure you have strobing support for 60Hz.
Not sure if you're serious about that but yes motion blur is expected with any 60Hz monitor. It might be annoying in cases.
However strobing for 60Hz isn't a great solution IMHO, as it cuts the brightness massively, doesn't always sync well with non-exactly 60Hz sources creating artifacts, and nearly gives seizures to people who aren't even that sensitive to flicker.
Then things like interpolation and BFI will look better but not without sync artifacts and massive lag.
I don't think a really good blur reduction method exists for playing consoles/pcb on a big flat panel yet.
Best thing to do is to deal with 60Hz motion, using a properly lit screen, with excellent to near-perfect response like OLED, so you're at least free from ghosting, which isn't nothing.
Unless you sit way too close 60hz motion for retro games isn't really a problem (oh sure people who play a lot of fast polygonal 3D games will be annoyed, but generally they use a PC with a dedicated monitor)
Excellent analysis, as always.
I'm serious. There is a utility for recent BenQ monitors and tweaking to match up with the Neo Geo or SNES is worth the effort.
You're absolutely correct about the trade offs. Strobing at 60Hz isn't for everybody. My game room isn't terribly bright, so I don't mind the loss of brightness. Flickering never bugged me, either. I'm color blind, so the world is already full of dull colors. There is also a crosstalk issue with 60Hz strobing that's always there, but I prefer a little crosstalk over blur.
It just depends how much the gross smearing bugs you. For me, natural motion and low lag are a big deal. (I only mentioned lag because motion and response give games a "feel" that I want. Both bad motion or lag will take me out of the game.)
Regardless, we can agree that strobing at 120Hz with 60Hz sources is awful.