i can see an immediate benefit if it can only help detect pd at stages where the first physical signs are enough to make 1 see a doctor. i imagine millions are wasted in tests for pinched nerves and other problems on diagnosing which to the trained eye is pd.
seems every yopd'er i have talked to had a few or more tests/doctor visits before seeing a neuro.
i imagine in a few years diagnostic tests for a lot of diseases will be a smart phone app.
there already are some.