JMHO, but I couldn't agree more... I think the shorter more brand-able "Holo" takes it over the longer hologram/holographic names... (And a cursory look at the SEDO marketplace seems to validate this opinion, as the "holo" names seem to be more in demand than their longer brethren... Granted, of course, this marketplace reflects current domainer preferences, not necessarily those of long-term endusers... )
Above noted, I wish all holo-investors the best of luck, as every holo-related name sale benefits us all...
On a different note, I've received mid-upper $$$ offers on my holoconcert and holoshopping names... Holding out for more...