I am not sure what is meant by "Ariba 9rx - Buyer and Sourcing vis-a-vis SAP SRM".
Ariba On-Premise continues to innovate and provide point releases on an 18-24 month cadense. 9r2 is expected to be released in May 2014 with 9r3 in Q4 2015. The roadmap items for 9r2 were 100% selected by our existing customers and we have presented several time on the content. If you are interested there are webinars posted for each of the features that are included in the 9r2 release (http://exchange.ariba.com/thread/3246). For 9r3, we have a narrowed the list of candidate enhancements utilizing 2 rounds of customer voting and we are in the final stages of clarification and assignment of selected features into 9r3.
There is a long and healthy future for Ariba On-Premise as well as SAP SRM and other On-Premise Procurement Applications.
Regards,
Jason Brown, PhD
Product Management – SAP & Ariba On-Premise Procurement Suites