hard light holograms Edit
Its seems a least some holograms are solid, you can embed spears in the one at the centre of the villa.
Activating Casino Holograms at the Receptionist Table? Edit
It says one can activate a greeter and security, however, I haven't noticed it to do anything after either have been activated.
I've noticed that once activated, the holograms (the girl in a dress...) fire lasers at any ghost people that appear in the lobby between stages of completing the main quest. Seriously, it took 8 seconds for 3 ghost people to be reduced to ash while I hid behind the counter.--184.108.40.206 18:56, August 11, 2012 (UTC)