Wow. Great.
John Carmack hinted at Oculus Connect2, that you could basically do a cubemap where is a "framed vision" with a stereo video screen. For example dr. Whos phonebooth. So you could look around and see the static interior of the booth and then "look outside" from the framed video screen, so you could travel around like this, with traditional stereo video making it appear to be live / 18k cubemap + audio creating the illusion that it all happens around you..
At this state of development, not a bad idea.
I agree that the option to compile all this into a proper form in order to be distributed via online stores, is of course a must to have. That being said, I need to point out that UE4 / Unity developers have quite painful times, because they can't distribute their products as easily as this, and they need to go trough a serious certification steps with proper phone ID tagging before installing them. Even early state versions.. So, we are very fortunate developers / artists for having as easy way as we now have..