Am I the only one who feels some kind of "Deja Vu"?
From what I could actually make out of the news entry, as worded by our good friend Michael, what Arlie is doing (which is fantastic, by the way) has much resemblance to what back in their day 3Dfx did with the original Voodoo Graphics 3D processors... If you recall, they had a 3D engine that required an already present 2D card. What my understanding was at the time they used the framebuffer from the 2D-only card to attach the 3D rendering of their Voodoo graphics. What this new technique does and how it was described, lauched me 14 years in to the past of consumer 3D graphics rendering.
I find it kind of ironic that we are coming basically to the same point as it all started back when 3Dfx originally introduced their Voodoo graphics 3D processors!
I'd love to see these hybrid modes supported right from the underlying infrastructure of Linux, X and the others.