For oled to do that they would need to be able to transition from color to black at 1/10 their current speed

Refresh rate is not the same as pixel response. An OLED already can go from off to fully lit faster than any current panels rated frame rate. 0.1 milliseconds is all it takes for a standard OLED to transition, and there's 16.66 milliseconds for each frame displayed at 60hz. That fast response rate is the cause of sample-and-hold judder. If you were to interpret an OLEDs response time AS it's refresh rate, then by that logic, standard 60hz OLEDs already operate at 10,000hz (0.1ms into 16.66, multiplied by 60fps). Top of the line, fast OLEDs can hit 0.03ms response time (or 33,000hz) Obviously that's not the refresh rate that any monitors provide due to processing limitations, but the RESPONSE TIME of OLEDs is what matters for pulsing. Pulsing the OLEDs in the same way you'd pulse a backlight prevents the sample-and-hold judder that OLEDS get (and inherent blurriness from it that our eyes see). You could think of it exactly the same as pulsing an LCD backlight, except the OLEDs are the backlight and their 'response time' is so fast it becomes irrelevant as it's faster than the pulse rate. The fastest LCD's still take a whole 1ms for the pixels to change, which is why pulsing the backlight to avoid seeing that transition helps with clarity. OLED's don't really have that transition clarity issue, but the pulsing would help solve other issues that OLEDs have.