If i were developing a market leading new technology i would be happy showing it off generically at this stage but less happy to detail the exact inner workings of what makes the secret sauce. I'm not sure why people are surprised by this approach. The cutting edge of AM is a very competitive space right now. The walk around was to showcase Siemens.
In the same vein, apart from Eos, who obviously appear in photos, no other companies/partners, software providers, powder suppliers etc etc are mentioned either