The release notes for .197 look pretty similar at first glance, but under Additional Improvements at the bottom, it now says "Model S will now display charge time remaining when you are Supercharging or CHAdeMO charging". I don't recall that being there before, just the line about the instrument panel screen coming out of Energy Save mode more quickly.
Though I did a test and the navigation doesn't attempt to route me through any CHAdeMOs, only through Superchargers...even where one stop at a CHAdeMO would save me 500 miles and several Supercharger stops.