https://www.techradar.com/news/xbox-one-may-2018-update-adds-120hz-support-for-silky-smooth-gaming

Originally slated for the April 2018 Xbox One update, Microsoft is finally adding 120Hz support on its consoles.

The May 2018 Xbox One update finally lets users take full advantage of their high-refresh screens. The new 120Hz capabilities should grant users smoother gameplay and faster reaction times, but you’ll actually need a display that supports this – of which there are only a few TVs and but a much greater number of gaming monitors.