In a world where Don LaFontaine steams up Birdseye Steamfresh vegetables

In a 2007 interview, [Don] LaFontaine explained the strategy behind his signature catch phrase, “in a world where…”: “We have to very rapidly establish the world we are transporting them to. That’s very easily done by saying, `In a world where … violence rules.’ `In a world where … men are slaves and women are the conquerors.’ You very rapidly set the scene.”

Steaming is a method of cooking using steam. Overcooking or burning food is easily avoided when steaming it. Health conscious individuals may prefer steaming to other methods which require cooking oil, resulting in lower fat content.

Birds Eye is an international brand of frozen foods such as seafood, meat and vegetables.
[They are] considered to be one of the founders of the modern frozen food industry and is credited with inventing a fast freezing process that preserves the quality of food.

In a world where Don LaFontaine does a commercial for GEICO

Donald LaFontaine (born August 26, 1940 in Duluth, Minnesota), is a legendary voice actor famous for recording over 5,000 movie trailers, television commercials, network promotions, and video game trailers. Due to the sheer volume of trailer voiceovers LaFontaine has recorded, he has become identified with the phrase “In a world…”, which has been used in movie trailers so frequently that it has become a cliché. He has also parodied this cliché several times, more recently in a commercial for GEICO insurance.

Trailers or previews are film advertisements for films that will be exhibited in the future at a cinema, on whose screen they are shown. The term “trailer” comes from their having originally been shown at the end of a film programme.

[GEICO] commercials use a variety of fictional characters such as Speed Racer and Bill Dutchess as well as real people such as Tony Little and Don LaFontaine spoofing themselves.