First, the faq states "gear and gadgets used during exercise" is on-topic. So I am going to ask about the Samsung Galaxy Gear Smartwatch (or similar watches) and I hope that is OK.
I would be interested in using a smartwatch as a full featured replacement for carrying my smartphone while running. I don't care about any phone-related functions. I don't even need to listen to music. I only care about tracking my workout in great detail. I want to record my route via GPS, my speed, my heart rate and even my cadence.
I use a Zephyr HxM that provides cadence, heart rate, and other data. (I also have a Zephyr BioHarness.)
Does anyone know if the capabilities of these new smartwatches that would make it possible to achieve my goals? If so, are there existing running apps that support this scenario?
Finally, since the Zephyr HxM provides r-r interval data, does any smartwatch app record this data?