Apple realized that people want to carry at least mobile phones and music players. Japanese firms also know that, and they are ready to go overseas with their high-tech mobile handsets.

In the digital era, it is easier for hardware to become multifunctional. It is different from the analog period, like with video formats.

Sony's strength is in its software businesses, such as music and movies. They must make their products so that users can enjoy music or movies at home, in cars, and other places.