Followmejs using firebase on Google App Engine.
Here is my link for Box Hackathon, where I develped this: Followmejs
Here is the video for this demonstration
If you wanna try this:
Open http://firebase-followmejs.uc.r.appspot.com/ in as many browsers and devices and possible.
Now open the presenation remote : http://firebase-followmejs.uc.r.appspot.com/r in any browser or mobile and swipe or click next and every one will just follow you.
Scan here to open this presenation remote in your mobile:
Just in case, if you are experencing any glitches, someone else might be accessing the same presentation remote.