proponents of the bono act argue that it is necessary given that the life expectancy of humans has risen dramatically since congress passed the original copyright act of 1790, that a difference in copyright terms between the united states and europe would negatively affect the international operations of the entertainment industry, and that some works would be created under a longer copyright that would never be created under the existing copyright. they also claim that copyrighted works are an important source of income to the us and that media such as vhs, dvd, cable and satellite have increased the value and commercial life of movies and television series.