Demo
Try on your phone http://vatelier.net/InWikiDemos/AframeEmbedding?action=aframe
Details http://vatelier.net/Demos/InWikiAframeEmbedding.
Here is another example https://github.com/Utopiah/ThetaWebControl controlling remotely a 360 camera.
How can those be used? How is that better than having a static page to host your experience? What's a state? What does saving a state on the server provides?