If you are thinking about going to DNS12-Medical after it comes out, being on a 64bit OS and having a minimum of 4G RAM is recommended to run their best algorithms.
Indy, some talk about Dragon 12 being able to use multiple processor CPUs more effectively, increasing accuracy & speed "by 20%". Same thing as they said for version 11, but I found the incremental changes were, well, hard to perceive (to put it kindly). Did you get any impression that this was more than sales fluff with version 12?
I have heard similar claims; there was a bit more detail about what is going on technically that makes me think that perceivable improvements are more possible. Multi-processor chips will be important to getting the most out of the next release.
Because we do a significant amount of virtualization, we will continue to benchmark on both Intel and AMD; AMD is recently proving a far better price/performance advantage - if speed is what you need. My current beast box is 8-core [amd fx 8150] on top of 32G RAM and SSD drive array.
I was stashed @ Topgun when they started the movie work; some entertaining stories about that American classic. Perhaps over beverages next get-together.