Instead of following the (silly) trend of a foldable display, LG chose a more sensible approach by adding a second display (which is detachable).
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Pro Cheaper than foldable displays
Pro Two apps
Allows to have two apps open at the same time and even drag-and-drop between them.
Pro Increased productivity
The second display can be used as a keyboard, gamepad or a viewfinder so the camera can be positioned at awkward angles.
Especially with the second display, the phone is heavy and brick-like with 324 gram.
Con Battery life
Using the second display will drain the battery.