I dig this idea. I wasn't able to actually get it to work, I think I was doing the moving-right action incorrectly.
I do wish it had the ability to change the phone's volume, that's the one big lacking thing from music playback that annoys me, you can pause/skip using the watch, but if you want to change your volume you currently have to use your phone.
It's not super-convenient (it takes two swipes to get to), but the Android Wear Mini Launcher ( https://play.google.com/store/apps/details?id=com.npi.wearmi... ) has a settings screen which includes a number of useful options about the phone's settings, including volume.
Good idea, will see if we can make that happen for the next update. For getting to work, try playing with the sensitivity slider in the motion you are trying to trigger.
I think the myo armband could be a good competitor, and it sits right under your elbow.
https://www.thalmic.com/en/myo/
It's $150 to pre-order and you get full developer access.
I got an alpha version of the myo and had some time to mess around with it. It's pretty powerful. Definitely worth checking out.
Pre-oders of the final production version are shipping next month, in case anyone is wondering.