The Emma Watch is a wrist-worn wearable that reduces constant limb tremors associated with Parkinson's.Image: screenshot: microsoft Smartwatches may not be as hot as they used to be, but that doesn’t mean wrist-worn wearables are dead altogether. Far from it, actually. Take the Emma Watch, a wrist wearable created by Microsoft Research Innovation Director Haiyan Zhang that’s designed to help reduce the hand tremors people diagnosed with Parkinson’s disease live…