The benefit of upgrading to the Note 5 isn't worth just being able to use the newer Gear VR headset. The changes between the 4 and the 5 are pretty insignificant far as I can tell. I was thinking of removing the mounting bracket from the older Gear VR and putting it on the new Gear VR, it is simply a piece of plastic. As long as the holes for the screws are spaced the same it should work, I'd think.