How much fps will the XBOX SERIES X have in games?
I guess 60, but it can also be 120
In well-running, competitive ones like CoD or FIFA, most likely 120, at least as an option with a slightly lower resolution. For normal story games I usually assume 60 (120 sometimes as an option).
I think most of them will run at 30 fps like previous consoles.
Some with 60 fps and rarely with optional 120 fps.
That depends more on the game or the developer and not on the hardware. In addition, as with the One X, you will certainly be able to choose between FPS and higher resolution more often.
Everything between a minimum of 30 and 120 will be included.