I am so glad I asked.
That functionality sounds really fun to play with. And I'm all for saving on the "clicking"!

Would this New Material Room be able to rock (the current) Firefly or would a plug-in (ala the LuxRender thread) to an external renderer or exporter to Bryce/Vue/etc be preferred as per the OP's original question. Would you want a Firefly II (of Firefly plus) to leverage this dream Material Room?

"Few are agreeable in conversation, because each thinks more of what he intends to say than that of what others are saying, and listens no more when he himself has a chance to speak." - Francois de la Rochefoucauld

Intel Core i7 920, 24GB RAM, GeForce GTX 1050 4GB video, 6TB HDD space
Poser 12: Inches (Poser(PC) user since 1 and the floppies/manual to prove it!)