Even smartphone designers themselves don't seem to know what direction they want to go. It seems they are regularly choosing new paths of engineering before fully optimizing existing hardware designs.
So it seems to be with the new LG Dual Screen Swivel that engineers are working feverishly to perfect.
Still in development and code-named Wing, the phone's design is "focused on increasing content immersion [as opposed to multitasking]," according to South Korean news site ET News. "When you run the photo app on the main screen, you can run editing functions on the sub screen or watch video content and browse related information."
We don't know a whole lot more than that. This article from core77.com doesn't contain much beyond that short sentence. You can read it here.
An article at xda-developers.com/ has a bit more info, but they both are using the same South Korean news source, so there are clear similarities, and really, more questions than answers at this point.
Let us know in the Comments if you are excited about this idea or wish they would stick to one design idea at a time.