I have the Gear VR and the DK2. I think mobile VR is going to take off just as fast as a category than desktop VR. I personally find it being wireless/portable to be worth the loss of positional tracking. I'm sure they'll get mobile positional tracking working in no time and then it will just blow hardline VR out of the water (caveat, minus having less fancy graphics), and it will definitely get cheap fast. It's already only $250 for the VR holder plus a Galaxy Note 4. Once they fuse these things together into one project and also streamline the hardware even more it will only get cheaper and lighter.
I agree, I love my Gear VR but I think the mobile solution needs to be an all-in-one device. I could see mobile and desktop VR using the same headset. With USB-C they could charge the headset battery while allowing you to power the display via your desktop computer, then when you disconnect it will switch to the on-board mobile hardware capabilities.
