On my F-250, 2 years ago, I replaced/upgraded the radio with a new head, essentially an Android tablet combined to a radio. I can now run anything I wish: Google Maps, Waze, Sygic, Spotify, etc.
The Fit and finish is perfect. It even shows the Ford logo as it boots up. It's a no name I got direct from China for $250.
Synced to my phone, a few ODB gizmos and now, after installing the app, it connects to iN-Command in my Cougar. It works fine.
I honestly do not see the advantages at all, I much prefer to use my phone.
I think it's a non-starter. So GM can't really be excited with this. GM has always been ahead of the curve on such tech. Look at OnSTAR, I often wondered why others did not offer it too...
My 2 cents.