No! Bad headline, bad!
Wii Fit did not tell a woman she had Parkinson's disease. It told here she couldn't keep an equal balance on both feet. Based on her assessment of this as an abnormality, she pursued further diagnosis from a professional and found out she had Parkinson's disease. Wii Fit didn't diagnose her condition; her and her doctor did.
For the same reason, we will not see a Wii Doctor. Computers can measure and model things, even point out abnormalities, but they can't reason about the cause of such things. No matter how complex algorithms get, it always comes down to us humans to find patterns and interpret their meanings.
Please, for the sake of journalism, don't make exaggerated headlines! Don't claim things that didn't happen! Don't make people think that Wii Fit can diagnose medical illness!