However they're still largely being used for their novelty value without any real relevance to the brand (happy to be proven wrong here if anyone has any examples).
Here are just a few examples from an Australian company called Cheoptics Holograms:
Ecco footwear, Copenhagen airport
ECCO Cheoptics Model 300 from viZoo on Vimeo.
Lexus window display
Lexus Free Format from viZoo on Vimeo.
Chanel, Paris
Exclusive custom install in Paris from viZoo on Vimeo.