I think some of your are mistaken...
Sure the Ultras are the highest 8800 model, but I don't think his Lost Planet demo tests demonstrate the cards power accurately in comparison to a 8800 GTX. I would think more benchmarks such as this, X-bit labs - The Return of the Ultra: Nvidia Readies High-End Update.
portray the power comparison more accurately. ( Not such a huge differance in performance, definately not 2x like a lot of people are assuming based off his video )
Tech ARP - NVIDIA GeForce 8800 Ultra Graphics Card Review Rev. 1.1
to summarize their differences nicely "It beat the GeForce 8800 GTX by 7% to 12% in our test results."