I'd have though the optimum system would be to have one display for editing and a separate display for "serious" preview with (a) no distractions and (b) the exact refresh rate and resolution of the target format.
Having a higher resolution “display for editing” means that one can see a higher resolution image in the timeline view when editing. Editors do not usually have monitoring displays (displays for just the output image). That is more common for Colorists and those producing DCI or Blu-ray masters.