For all the Tasker fans out there; with the Tockle app you can start Tasker tasks straight from your G Watch.
Those who are familiar with Tasker know this makes the G Watch possibilities (almost) endless.
It's in beta right now but works great!
You have to join the Tockle community on Google+ to download:
Very very happy with this so I thought let's share
I currently only control my lights with my G Watch but many many projects to follow.
*edit: I made a typo in the topic title: apps should obviously be tasks. My bad :s