Last night I started watching an old Sci-fi film from 1983 called Wargames, which I recorded off the TV.

The story involves a (surprisingly young) Matthew Broderick has a teenager who unintentionally hacks into the U.S Defense computer and almost causes a full scale war.

There is a scene early on in the film where he is at a arcade, and watching it I noticed there was an original Tron Arcade game machine in the background.
If you look carefully between 00:28-00:34 and 00:38 onwards you can see it in the background, near the main door:

https://www.youtube.com/watch?v=Byn5PIZ0q4Q
The thing is I've seen this film about 3 or 4 times, and yet that's the first time I've actually noticed it!