The funny thing is that the world is like this: The USA and the REST OF THE WORLD.
The USA has set itself up to be deliberately different. It was supposed to have adopted the SI System by the year 2000 -- THE REST OF THE WORLD uses metres, kilogrammes, etc -- but not the USA.
The REST OF THE WORLD cannot even send a fax to the USA because the USA has DIFFERENT PAPER SIZES to the rest of the world!
The rest of the world has its own video and TV system, magazine size, spelling, dictionaries, printers, software, screen ratios, and loads of standards.....
The Rest of the world is concerned about pollution, but the USA didn't sign up for Kyoto!
The most popular game in the world -- bar none and hands down -- is FOOTBALL (Association Football or what US Americans call "Soccer"), the USA has had a team in the top 20 for years, but the game is NOT "American" in any way.
Games that are extremely popular in the USA tend to be of minority interest in the rest of the world.
I am sorry, but companies like McDonalds or Disney or movie stars do not have any lasting or historical effect on even American culture!
For example, in an typical European home, the HiFi, VCR and TV will probably be Japanese, German or Dutch. German or Japanese air conditioning, kitchen appliances, and computers/ gadgets. The music will be British Pop, and the foods and drinks local.
You can find a few products from the USA -- mainly Cars (Ford, General Motors, Chrysler), but they are in competition with or partnership with European and Japanese cars. Movie Special effects and computer graphics are done in the UK, and it seems that everyone is filming in New Zealand these days! The musical instrument market once dominated by Selmer, Rickenbacker, Gibson and Fender is now totally run by Japan -- Yamaha, Suzuki and the like.
Even Time Warner is owned ultimately by Sony from Japan... so Hollywood is basically Japanese these days!
Coke, pepsi and cigarettes are made under license, so what is actually American?
All I can come up with is: Fast food (McDonald's, Pizza Hut, California Raisins, Peanuts, Bubble gum, etc)
Casual clothes (GAP, Levis, Wranglers), software, TV shows, Movies, Slimming Diets.
... hardly a global domination! LOL!