For your upcoming yet-unnamed flight simulator with FlyInside built-in, please consider working with hardware/software developers such that the GearVR can be used as a headset. On a VR-ready PC, the GearVR can come very close to the performance, resolution, and usability of an Oculus headset, but for those owning a Samsung S7/S8 is much cheaper than an Oculus headset. Some kind of PC<>GearVR hardware/software interface would need to be developed that maybe exploits Windows Mixed Reality support built into Windows 10, and has GearVR compatible connectors (or works wireless).
Thanks for considering!