The same thing was done last year for ITV's Les Dawson: An Audience With That Never Was to bring the man himself to life. That too was touted as a hologram. I agree with Aractus that the use of the term 'hologram' is inaccurate and misleading. It's on the lines of selling those old comicbook advertised "X-ray specs" as genuine medical and surveillance equipment. A hologram is an interference pattern in a medium such as film generated by the arrival time difference at the medium's surface between two coherent laser beams, one reflected off a target object and the other a reference beam. Sufficient information is recorded to exhibit parallax, giving a realistic three-dimensional photographic image of the object viewable from various angles. The technique used for these stage presentations is an updated form of Pepper's Ghost and predates holography as we know it by over three centuries. The technology involved in creating the modern iteration of the illusion is undoubtedly impressive, but not holography.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'