It's pretty cool, but it's not what I would call 'eerily' lifelike. More like a good video game version of Tupac.
They did a similar thing for the live show of War of the Worlds a few years ago by creating a disembodied head of Richard Burton so he could do his narration stuff during the live show.
Sure, infinitely easier to animate a head, but both the Tupac and Burton vid did a good job considering.