I don't get the point, those are hardly the only countries watch world cup. For a event like world cup final, it's the single most important match in 4 years. It won't just attract fans from the countries that are in the final.

For example, the 2006 world cup attracted 4 billion viewers from China, and their team was not even playing.[1]

[1] http://www.fifa.com/mm/document/fifafacts/ffprojects/ip-401_...