We are very very very sorry for the messing up! Tablet is now working properly!
In case the update doesn't show you have to end the Steam process and launch Steam again, or wait 10 minutes for it to show.
Tablet is fixed!
Source: Steam Community (opens in a new tab)
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.