I read your statement to assume that entering data into Watson is going to take longer than "entering" that same data into your GP. How did data entry for Jeopardy work?

This would mean that the main issue in adoption of Dr Watson (Hmmm, haven't I heard that name before?) would be the data entry - obviously a pain point in many digital services. If an effective answer is found, and I would suspect that this should soon happen, then the argument becomes more a matter of whether you prefer a subjective opinion from your GP (based on his/her current thought processes / focus) or an objective one from a digital process.

I think I'd prefer the digital process, once the main issues are ironed out.