Shadow of the tomb raider, Just Cause 4, Assassins creed odyssey/origins, Hitman 2, Watch Dogs 2, Crysis 3,witcher 3 to name a few won't run well at max. You would have to drop down quite a few settings to get it to run at 60+ at all times. Rock solid 144hz is almost as demanding as 4kKinda meaningless unless you state a particular game in which you was referring too, I agree not all but a lot will just fine.
So the blanket statement of 1400p @ 60hz is wrong