PebbleFlix allows you to control Netflix on your Mac. 

Just install and run the server app on your Mac, open PebbleFlix on your watch, then you can pause, play, and adjust the volume. 

To download the Mac application, click "WEBSITE LINK" below and send the link to yourself, or visit the following URL on your Mac:
http://octalmage.github.io/PebbleFlix
(Capitalization is important)

Also works with Hulu, YouTube, Vimeo, VHX and many other services. 

Mac OS X only, Windows version coming soon. Star the GitHub project to get updates.