I still have the Verizon CDMA version. Bionic, and really liked the Webtop Linux booted up when plugged into the Lapdock. I looked forward to "Webtop 3" updates for using with the next gen Razr HD that fit right onto the dock, but that was about the time, after Google had taken over Motorola Mobility, that they were cranking up the Chrome books. I suspect they saw Lapdock/Webtop as a threat, and killed it off.
Now I use the Lapdock for Raspberry Pi's (it even powers one to make it a fully portable, if somewhat clunky, laptop), and it even worked as a Lumia 950 Win Phone 10 Continuum peripheral, too.
Now I suppose they are re-inventing Weptop...