Android Wear 2.0 - Ratings supported?

[cyd]

I have an Android Wear 2.0 device. When I start MMA (1.3.1.0723) then I can see the current track on the screen. Also there are some controls e.g. to switch tracks or change volume.
These controls are working fine.

Also in the options there is the following screen:
(http://imgur.com/a/PAY6W)
But if I press the "rating down" or "rating up" button nothing happens.

For me it looks like the view is from MMA.
Does anybody have more information about this?
Or how I have to use the controls?

[cyd]

Am I the first one who uses a Android Wear?