The ability to create email subscriptions gives rudimentary notification when alerts happen. The ability to run a powershell script would open the possibility of integrating with 3rd party monitoring and notification systems. Current systems such as Solarwinds, PRTG,nagios/icinga2 and others have REST interfaces that can easily be addressed from powershell. This kind of integration would enable shops that choose not to run SCOM a way to integrate SCCM alerts into their existing monitoring set ups.

Ideally the script call would be able to pass the alert data to the script in some fashion.