Here are two insightful slides from the Open world presentation on PeopleSoft HCM product line. It clearly underlines the commitment from Oracle to support PeopleSoft and come with newer releases more often. The adoption of 9.1 has been phenomenal as seen from the first graph and the decision by Oracle to deliver quicker feature changes bodes really well for the customer.
Figure 1: Adoption rate comparison between 9.1 and 9.0
Figure 2: Investment strategy on PeopleSoft product line - 9.2, 9.3 etc.