SAS stated that the Information Map Portal hasn't changed much since 9.1.3, but there are a couple of really well placed modifications. Included are my notes on the benefits of moving to Portal 4.2:
- No xythos - using SAS Content Server now
- Sticky Pages renamed to Persistent
Additional Reference:
What's New http://support.sas.com/documentation/cdl/en/whatsnew/62435/HTML/default/titlepage.htm
Of course, please note the major difference that could affect your current 9.1.3 deployment - there is NO Public Kiosk available in the current release. There are work arounds, but they would be programmed by HTML developers and not managed via the Portal or SAS Management Console.