Despite coming in at a super low price point in comparison, the Series S can play all the same games as the more expensive Xbox Series X. As well as saving money, you'll also save on shelf space - the Xbox Series S is completely disc drive-less, so you need to buy all your games digitally.
Across the current Generation consoles, Modern Warfare 3 stands as a game that really benefits from 120Hz and a VRR screen, especially on the Xbox Series S. The PS5 and Series X remain the best place to play on consoles, with the Series X just pipping the PS5 in that 120Hz screen.