I use one of my phones to track my walks (not with sMiles, or any freaking Gøøgł€ PoS, of course), and measure my heart rate placing my index finger on my wrist and counting. LOL

For other monitoring I'm sure there will be less annoying sensors, like small patches or probably finger rings.

bitcoin

Opensource wearables?

crybaby

I agree. Really no reason unless your tracking miles/heart rate while running. 

Theres some interesting tech coming down the line, blood glucose montitor, ECG,  but i still probably wont buy a watch