No, if you look at my original post, I was estimating the cost of the demo machine described in the article that this thread is based on (and the 'up to' specs on Apple's web site). Please re-read it.
In theory, they could build a much cheaper quad-core-based machine, but it still needs two GPUs capable of supporting 3 or 4 displayport connections (It's possible the CPU could have a GPU to support the HDMI port).
I did re-read it and the main article doesn't list any specs for the demo machine they used.
The current 12 core Mac Pro costs $3799. They're not suddenly going to jump to a price of $10k. They would be a laughing stock.