Den of Geek has listed the top 25 fictional ads in sci-fi movies. It makes for fun, nostalgic reading. Here's the top 10 they give, but head over there to see video clips of the whole list.
10: Galaxy Quest (1999) - TV spot.
9: Robocop (1987) - 60000SUX TV spot.
8: Artificial Intelligence: AI (2001) - The adscape at Rouge City.
7: Robocop 2 (1990) - "Sunblock 5000" TV spot.
6: Total Recall (1990)- "Rekall" TV spot.
5: Back To The Future Part II (1989) - "Jaws 19" interactive holo-poster.
4: Robocop 2 (1990) - "Magnavolt" TV spot.
3: Minority Report (2002) - Ads that know who you are.
2: Starship Troopers (1997) - "Why we fight".
1: They Live (1988) - Nada discovers the truth.
Did they miss any of your favourites? Have you seen any real-world ads that look like this lot?