Here is my experience.
On chrome it works, but... after about 15 seconds my graphics card driver crashes and the demo goes black. While it was working the demo was very laggy.
On firefox it worked, perfectly. It was smoothly responsive and noise was barely noticeable after 3secs.
On internet Explorer, trying to change the scene presets causes mem usage to climb furiously to to the point you have to kill it. otherwise the demo run beautifully and was very responsive.
I wonder how would it hold up for complex scene with lots of different materials. And how far it is form having effects like Caustic.
However on Android 4.3 and 4.4 with Chrome 39, using a Qualcomm Adreno 305 GPU, I just get a black box. As usual with most WebGL stuff.
Well, technically on a remote server that streams in.
Working on some web based VR stuff - would love to hear your thoughts: http://www.insitevr.com/
We will have VR support soon too as many people are requesting it. And we could collaborate on improving our import support: Sketchup, Rhino, etc.
Seriously, we should work together. :)
I'm pretty sure in those cases the higher megapixel cameras also have straight up lower SNR.
It's still a cool demo though!