Relevance or otherwise of CMMI

The SEI has realized the need for a business model to promote its maturity models by bringing out V1.2 of the assessment method, SCAMPI. The similarity of the new method to ISO 9001:2000 is obvious and for the first time SEI has shown interest in administering the assessments directly with the introduction of the validity period of three years.
When the Indian software companies adopted the CMM and CMMI models for marketing leverage in the late 90's the SEI didn't have to do anything special to spread the method in the industry. However, of late, there is no significant advantage for companies already at 'high maturity levels' to upgrade to CMMI V1.2. One of the features of the earlier CMM assessments (CBA-IPI) was that there was no endorsement from SEI about any assessments and the assessment results didn't have any validity period. This resulted in a slowdown of CMMI assessments in India, when there was no specific customer expectation also.
So, it is time SEI acted to revive the maturity model framework and force the companies to commit to the assessment results by way of the new initiatives in V1.2.
If a search for reports on the RoI and Cost-Benefit analysis of complying to CMM or CMMI over the last 10 years, one may not find any worthwhile case study! Cycle time reduction and Productivity improvement in Software services has reached a plateau and it is hard to establish a correlation between the assessed maturity level and the business parameter improvements.
CMMI probably misses out a significant part of the business processes from its purview by limiting the focus on project management and software engineering processes only. Isolated maturity models for Sourcing Capability, Software Acquisition, People Capability, and Business Excellence are not serving the industry due to lack of synergy among them and the perceived overheads in meeting the model and assessment requirements. Why can't India, particularly NASSCOM, show leadership by forming a consortium of leaders in software services industry to define a simple and comprehensive framework for Software Services Excellence, keeping the customer and quality as the central theme?