If I could take my watch off while I sleep and still get good heart rate / sleep tracking from devices positioned around my bed that would be great. My watch can cause skin irritation and I find it valuable but not having it on while I sleep would probably be healthier. Also as I get older if I could put a wifi device in each room that did active tracking and not have to carry a device I need to keep charged that would be great for life alert style thing, and general health monitoring.