Paul McCartney: AI has enabled a “final” Beatles song
arstechnica.com
arstechnica.com
It initially had me thinking this was "just the same thing" as 3D-model Carrie Fisher in Star Wars but, in this case, John Lennon's recorded voice was isolated from the cassette recording rather than a simulacrum of his voice being fabricated. It's an interesting twist on "but is it really $CELEBRITY?" that this is really John Lennon.
I think it’s fair to say John intended to give this to Paul to work on.