Does the Web Player support PBR?

Is it possible for me to develop content using PBR materials for the web player? I love the way Substance Designer is integrated well with Unity now but what if I want to use content that already has PBR material created for it in the web player, to showcase the PBR materials for instance? Is it do-able? It's not exactly clear in the documentation so I thought I'd ask here.

Thanks Alan