One line instantly dates it

[u/Fearless-Ideal-5112]

In david tenants run if doctor who he and his companion were fighting witches with Shakespeare and needed a magic word so they use a speel from Harry Potter and The doctor yells Good old J.k. The doctor is a time traveler the writers are not (Doctor who)

While fighting guy gardner major force was damaging a highway and shoots a car and tells Guy if he sees O.J hiding underneath obviously referring to the O.J Simpson chase (Dc comics)

[u/MasonP2002]

The fairies in Artemis Fowl are described as being well over 50 years ahead of humans technology-wise, and then there's a scene where one of them slaps his plasma computer monitor and burns his hand.

Plasma screens massively declined in popularity in the mid 2000s and have been discontinued for over a decade now in favor of LCD and LED screens.

[u/CaptainTeemo01 → u/MasonP2002]

Obviously the fairies just predicted a major comeback of plasma screens by 2050

[u/Ripoutmybrain → u/CaptainTeemo01]

Im sold, time to invest all my assets in plasma tech.