CHI & Partners created the ad, which opens on a packed coliseum in ancient Rome. As gladiators file out of the gates, a father and young son, in a dressing gown and a onesie, appear in the centre of the action.
After a "thumbs down" from the watching emperor, the gladiators charge at the pair, but before they get too close it is revealed that the man and boy are just watching the action on a new UHD television. A voiceover then kicks in, describing the product.
The 60-second spot, which was shot in New Zealand and used 350 cast and extras, was written by Micky Tudor, art directed by Monty Verdi and directed by Nathan Price through Park Pictures.
The ad breaks today and will run on TV and online. The wider campaign also comprises outdoor and press executions.
Yoonjung Lee, Samsung's vice-president of TV global marketing, said: "We wanted to create a commercial that involved and surrounded the viewer, to dramatise a TV innovation that allows an immersive viewing experience like never before."
Samsung kicked off a review of its global advertising and media agencies, as revealed by Campaign in April.