While it sounds like a fabulous way for the manufacturer to spread the word about the model, the truth is that Samsung's "takeover" of the terminal has been over-exaggerated. After the U.K. press complained about the promotion, and nervous travelers expressed fears about getting confused, the airport released a statement that called the whole thing a "tongue-in-cheek campaign using the line: 'Terminal Samsung Galaxy S5'." Heathrow said that Samsung had merely rented some space for a promotional campaign.
To make it clear, Samsung is not taking over Terminal 5 at Heathrow, but is paying for advertising space that any other company could rent. The confusion took place because of Samsung's press release which said that Samsung was re-branding the terminal and would be taking over "the signage, wayfinding, website and every single digital screen at the UK's newest terminal to promote the launch of its iconic Galaxy S5 mobile."