Who'll buy the Ultra at a $450-500 price point? A fair amount of people actually, just like people who bought a SLI originally or would have gotten a V5 6K. nVidia knows that the $500 price range is a niche high-end market and that the next gen series, EG NV20, will have different models that will eventually(Fall 01) replace the whole lineup from the MX to the Ultra. Remember though many TNT's are still sold now.
How many people will buy the Ultra when it sinks to $300-340 or so by the end of the year?

This is the projected price I've been hearing from graphics companies. Possible? Certainly, unlike the V5 6K or even the 5K the cost of the Ultra is in limited RAM, which will certainly become less limited as time goes on.
I expect honestly that the NV20 will come it at the $400-450 price range and quickly drop within 3 months to 300-350. Just think how much a Geforce Pro or Radeon 64MB will be then.
I also think 2D quality is very important and I hope that the graphic card companies will start to pay attention more even at the low end with the attention that it is starting to receive. There are some Geforce series cards that use lower quality RF filters that will affect all 2D quality. However what I'm hearing is that series wide nVidia, like ATI, has is an issue with Trinitron monitors that is resulting in the majority of serious 2D quality issues.
However the other issue is that graphics card companies are probably thinking that if someone is buying a 19" monitor that they'll buy a $200 price point video card. However with dropping monitor costs, less and less MX price point buyers are going to be using 15" monitors and 2D issues will become more and more important.