Role of technical guy in ESA/CAF

Hi all,
I dont know if this is a correct forum or not But I wanted to know firsthand from the ESA community.
   I worked as a J2EE consultant for 5 years. I moved to SAP integration, NetWeaver and EP about year and half back. I have had roles varying from pure coding to architecting applications. When I saw ESA, I got excited and started reading about it. As a J2EE consultant with pretty decent ABAP and R3 knowledge, I thought ESA/CAF should be a familiar and right turf for me.
As I read more about ESA, I got confused as to the role of a technical guy in ESA.
If my understanding is correct, SAP is on its way to publish most of its BAPI/RFMs across its products as web services. What would be left now are ESA enable non SAP systems and writing composite applications using CAF and ESA.
Given this background I want to ask the following questions
1.     How many companies have adopted/looking at adopting ESA?
2.     How many of those organizations are looking at
        ESA enabling non SAP systems?
3.     Will there be a role to any technical guy in
        that enablement? (j2ee,netweaver java etc etc)
4.     Can a technical only guy survive in ESA space
        without business knowledge?
I may be entirely wrong in my assumptions. Your experiences and opinions would be greatly appreciated.
Regards
Pallayya Batchu

I appreciate your quite response. You rightly pointed that one cannot servive without functional knowledge. But this question still nags my mind.
Is ESA for only functional guys? (because all the webservices are written by SAP or its parters and implementing company is expected to use them by orchestrating.......?)
Do you expect other companies to create web services? If so, from exising components or from scratch?Again if the answer is from scratch then the implementing company need functional as well as technical guys. It might be correct that the technical guy has to know business before effectively designing web services.
Am I thinking correctly here?

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