Extend the abstract

Author: zooba

peps/pep-0773.rst

@@ -24,6 +24,13 @@ existing installers for the platform, while avoiding most of their limitations,
 and provides the core team with the ability to manage releases for many years
 to come.
 
+With the new installer, the recommended command to launch the default Python on
+Windows will be ``python``, while the command for managing multiple versions
+(including launching a specific one) will be ``py``. Users can also opt-in to
+having global ``python3.x`` commands by adding an extra entry to their ``PATH``
+environment variable. We recommend starting with the "How to teach this" section
+for the most concise high-level overview of the features.
+
 Reader's Note
 -------------