As a result of the accelerating process of globalization in various aspects, young people in different countries are more likely to enjoy the same music, films, or television programs, which invariably result in some similarities.
Some people may claim that it is more a curse than a blessing for the world. One argument commonly raised that this process will be damaging to the globe diversity. When locals are bombarded with foreign products or culture, they may gradually abandon their traditional values or ways of life, so this would have a negative impact on their national or cultural identities in the long run. They even quote numerous examples such as the Eskimo in Iceland and Mosuo ethnic group in Southwest China to illustrate their point of view.
While this is particularly true of some minority cultures, I want to point out that they are still special cases instead of the general rule.
Generally speaking, sharing something across the globe can contribute to a deeper mutual understanding between different nations. For example, a piece of country music by John Denver may well shed light on the peaceful daily life of Americans while a pop song by Cui Jian may introduce to Westerners a much more familiar China. What is more, an experience of some alien cultures may encourage more appreciation of the local ones, rather than assimilation or malfunction.
There is overwhelming evidence on this when we consider japan, or China, or even the US, which tend to incorporate the international elements into the local.
To conclude, I am quite optimistic about the prospect of an increasingly similar world. Of course, some minority groups may be put at a disadvantage for they cannot receive equal attention as the superpowers. So I also advocate that governments or other bodies should make efforts to bring these minorities into the international horizon.