No wristwatch, but I have glasses and without electricity I stop breathing. (While asleep.)

So, yeah, cyborg.

If you are in a 60 Hz electrical area (i.e. the Americas, mostly), and the power is rock-steady, and you have cheap fluorescent lighting -- then anything other than 60 Hz refresh rates might improve your screen, but much more so on old CRTs than on modern LCDs and OLEDs.

These days, like most smartphone 'features', it is mostly but not entirely about a checkmark to induce you to feel that you are missing out on something.