Hi Raghvendran,
Much has been already explained by CB, Balaji and Mary has already explained very nicely for all new functionalities with EHSM in her blog. I won't go into the functionalities of EHSM or about the many enriching user experiences like guided workflows, adobe interactive forms, or for that matter many new reporting features etc.
I understand from where you are coming as I have found myself in your shoes occasionally while dealing with customers as consulting partner. After having invested in and stabilized a system, if customer is advised that now you need/ought to migrate to a new system, the obvious question is 'What's the need?'. More so, when you explain that ESHM is still evolving and you would still have to live with classic EH&S partially for time-being (particularly, customers having matured Product Stewardship solutions).
On this, I would like to put a very generic, yet simple analogy of transitioning from CRT TVs to modern Smart LED TVs (I might not make complete sense with this analogy, but still let me try). In an age of Digital transformations at Enterprises, SAP is now more than ever aware of the platforms on which it should be providing the solutions; which should be futuristic, flexible, and scalable all at the same time. Classic EH&S solutions in itself mostly served as 'system of records' having robust integration with other modules thereby fulfilling for business process efficiency at maximum. Now, the times are changing, you need to have real-time analytics of KPIs (HANA), IT solutions should be able to 'predict' (Predictive Analytics), "consumerization of IT is here, mobility is key (Fiori), web-access is the need now, cloud solutions are getting adopted (Success factors etc). Tomorrow's EHSM solutions might also have IoT (Internet of Things) and Big data strategies also to stay ahead in the competition. To achieve all this, you can't continue to operate in old way, on old platform.
SAP Netweaver Composition Environment (CE) is that platform which enables building and running applications based on Service-Oriented Architecture (SOA) principles. Please refer below CE introduction to understand why it is the futuristic platform for EHSM solution build.
Introduction - SAP NetWeaver Composition Environment Library - SAP Library
Also read, below document to understand what's new on this platform.
http://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/20d1fefa-ebf6-2c10-3eba-d12473683ff8?QuickLink=index&…
PS: SAP experts and other experienced Consultants/Analysts are here on this forum. Please correct me if I have gone wrong somewhere in my analogy or point of view.
Regards,
Pavan