SAS 9.4 undoubtedly provides new capabilities for programmers and data analysts, but it also promises simplified and broader administration capabilities - some of which benefit users as well as administrators by offering enhanced availability.
One of the most intriguing aspects of 9.4 for advanced programmers will surely be the formal introduction of DS2. I focused a number of items on DS2 earlier in the year and it holds a lot of promise for improved performance.
For administrators (and users), the high-availability metadata server is well worth investigation.