I think it will be better then 1080P, but then this is Apple and they don’t mind having low res screens in 2018 even if they do look good. It won’t be as high resolution as the X though.
A 1080p screen would still be lower resolution than the one on the x , so they could still say that the x has a better screen for those who want more, so we should all be happy , but like you said they know their screens look good so they might not bother :/ I mean they are still selling the maybook air with a 1440 x 900 screen and charging you 1100 euros for it ...