This holgram thing is really taking off -- I see Bill Murray has one now; almost as good as the original, only in black and white. And maybe even an entire show based on this. If you can believe him. On last night's "Late Show With David Letterman," Murray was on hand to promote his new movie -- also starring Frances McDormand -- "Moonrise Kingdom." Of perhaps greater interest, Dave asked about the possibility of "Ghostbusters III." Said BM: The script's "gotta be really funny. ... We'll try." That sounds kind of like news to me.