Perhaps they aim to get rid of the keyboard completely, replacing it with a haptic feedback capable device and a glass plate with the keys inscribed?
Typing, unless you don't know how to type, is done entirely by feel. You have raised spots to align your hands, and then you work off muscle memory and the feel of the keys. Things you feel before you push the keys...
That's no longer true once you have a range of keys that you are pressing. You need to ensure your fingers are properly aligned so that you press the key you intend before you press it. Without some actual structure, you don't get that feedback.
They did the same thing with the iPhone 7. They removed the physical home button and simulated feedback with vibration. Then they got rid of the home button for the iPhone X.