Spoilers obviously.
Spoiler
In Rouge One, we see Tarkin and Leia return as CGI characters. Tarkin's actor is dead and Leia's is old, so they went the CGI route to bring these characters back. The thing is, it actually LOOKS GOOD.
This opens up a whole new doorway, having a mainstream movie do this successfully.
Example picture below from the movie:
Edit: I typed Rogue as rouge in the title like an idiot.
Gareth Edwars has opened Pandora's box [ROUGE ONE SPOILERS!]