'AI Stephen Hawking would look like him': Holographic avatar of long-dead celebrity scientist could collaborate and compete with living university lecturer

It used to be that when a pop star passed away or retired from performing, you could no longer see them live, but the advent of holographic technology has changed everything.

From Tupac to Elvis, deceased celebrities are increasingly being brought back to life as holograms, and tech companies could reinvigorate the education sector.

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