G2 screen refresh rate (20200121)

[grsbanks]

I'd guess that this was made possible so that you can shift the refresh rate even further away from the local AC frequency of your country.

AC is 50Hz or 60Hz depending on where you are, so HP settled on a 55Hz refresh rate so that it shouldn't be affected by fluorescent lighting. If there are, however, some lingering effects then you can get closer to a 50Hz refresh rate if you're in an area where AC frequency is 60Hz, or closer to 60Hz if AC is at 50Hz where you are.

This said, I don't know what the boundaries are.