This technology is only do-able with a Holo-Lens device, but still the full-size hologram could be presented on a screen for an audience.  I can see Presidents speaking to worldwide audiences in their language using this technology.  I can see the reincarnation of let's say, Ronald Reagan or John Wayne.  But what about the 2nd coming of Jesus?  The scriptures says there will be false messiahs who come first.  Be not deceived.  The Bible says we will recognize Jesus by His voice ("my sheep know my voice"), not by photographic image.  Don't think they haven't thought of this already.  -Bill Sardi