That’s not a real hologram, it’s a video dubbing occurring in a computer. Blitzer could not see the “projection” of the other anchor. The Star-Wars fuzzy image is just a gimmick effect of bouncing laser light off the anchor.
Far more sophisticated effects occur anytime you watch a sports event and the billboards you see out around the field are actually filled in with region specific ads.
It’s always fun to check out the attention to detail on this stuff. One network (I forget which) was throwing this virtual stat board up on the field during NFL games for a while, I think they got complaints about it and it went away but I like the fact that they included a “shadow” that matched the goal post shadow angle. Nice touch.