Throwing out the idea that this is going to make radiologists jobs and half of their depended employed medical-field co-worker obsolete is kind of far fetched IMHO. I've lived in some pretty big urban areas down to po-dunk no-where and I've never had a diagnosis or analysis done with Watson. It's probably more with my sheer lack of knowledge on the topic and 'real' (not theoretical or proof-of-concept uses) of Watson in the real world. Maybe I'm the outlier here, but I've honestly never experienced them first hand (and no I'm not counting e-medicine or skype-like appointments). Has anyone else?
I support remote sensing science applications and regardless of how much image processing, trained models and HPC crush power for analysis we do, most of the scientist in our GIS department still prefer human analysis with the naked eye as the final approval. Not that GIS is anything close to medical field, but from a pure analysis perspective, human processing and interpretation still rule those domains.
The only real cool thing I've seen Watson do in my life is play an impressive game of Jeopardy and quite honestly, I wish it would have blasted Trebek SNL style. I hate that pompous guy.