I would also add do not expect much more than a overclocked GTX 580 for the power of either Durango and Orbis. It the 8800 rumour is true, then it coheres to that fact, since the 8800 is a rebadge of the 7870, which itself is a "clone" of the GTX 580.
I have no idea, I've been reading this a lot in this thread but it always gets ignored.
Also, it looks like no one really has an idea what to expect from the gpu.
and omg, what's with that London picture? Could a spiritual pgr5 really be in the works ??
that road texture seems current gen though, maybe just the pic