LG just sent out invitations to an event on October 1st in New York. The company hasn't said what device will be announced, but the recently leaked dual-screen V10 seems most likely. It looks like LG really is going through with this secondary display thing.
The V10 is alleged to have a small auxiliary screen above the main display, a move reminiscent of the Samsung Continuum from 2010. The event is movie-themed, so we can probably surmise the V10 will have some sort of special video features.
All will be revealed in a few short weeks, at which time we can probably all chuckle at how gimmicky the phone is. This is an assumption, of course, but I think it's a safe one.