Jenny Lerew at Blackwing Diaries happened on this from today's New York Times before I did, and I concur with her analysis: It remains to be seen if yet another chunk of clever software is going to revolutionize animation. (Look at the video in the linked article above and see what you think)...
As for the idea of bringing back dead movie stars to fill up acting space in new film product, it will be interesting to see how THAT turns out. Apart from the hard reality that any new Monroe, Cagney or Gable performance will essentially be the digital reflection of the remembered shadow of the genuine article, there will also be the small problem of acquiring the rights of replication from the actors' heirs.
Then there's the teensy problem of not creeping out an audience by doing it, and having it perceived as anything other than being a stunt.
But enough from me. I'm sure others are going to jump on this. Go read Jenny's piece.