p3d is indeed pretty cool. It's been partly developed by a blender developer and was featured recently on blendernation.
I tested it out on an unfinished model.
It's pretty cool it runs so well. Comparing Firefox to Chrome it does run significantly better on Chrome. The FAQ says it has the best support for Chrome but I didn't think it would be noticable.
Support for textures and other stuff is planned. I noticed that wire rendering is now supported. It wasn't available a couple of days ago so development seems to be progressing quite fast.