My X is relatively quiet, but I notice a tremendous difference over different pavement surfaces. it can go from ultra quiet to pretty noisy with just a change in pavement.
The latest adaptive suspension seems to quiet things down significantly as well.
I imagine the new refresh with included active noise supression will bring the quiet interior to a completely new level.
In addition, Tesla has introduced new, more efficient tires with this refresh. Imagine that will make the Model S & X some of the quieter cars on the road.