Not that I would ever be caught dead wearing a stupid I-watch, but they have a lot of money to throw at this:
Patent listings reveal pipeline innovations from Apple, Shimano and Praxis
17 March, 2017 Mark Sutton
Apple’s power grab
"First of all it appears that Apple has an interest in a cyclist’s power data. An application for a patent filed last week indicates that data giants in cycling might soon have some very well-funded competition.
Titled “Calculating an Estimate of Wind Resistance Experienced by a Cyclist”, the patent in question is for a device that would calculate acceleration, heart rate, wind resistance and even the road surface and rider stance as a factor, ultimately delivering a reading of rider power minus the expensive powermeter."