Never mind the battery power that would consume. Most of the watch is going to be battery anyway but a celluar radio is just that many more chips that need to be added that consume space as well as power. It is possible, just not very likely a...
gyroscope, compass and the new barometer, which senses air pressure to provide relative elevation. The M8 motion coprocessor can continuously measure your motion data, even when the device is asleep, saving battery life for fitness apps that use the sensors all day. With iOS 8, motion data...