Who's to say that the ultra isn't just to clear stocks of g80 in anticipation of g81?

If g90 is out at the end of the year, theres not a great ammount of time for a die shrink g8x part.

If nvidia is already producing g81 components ready for a launch a month or two down the line, slapping an 8900 cards cooler on a 8800gtx and calling it an ultra may just be to help clear out the last g80 cores.

My personal belief is the ultra will be at the same price the gtx is currently, and the gtx will fall in price to give it a better price:performane compared to ati's offering.