"Why aren't Japanese and Chinese
developers making a system like this?"
They are. It's just that in Asia they're called
electronic dictionaries, and they never make it to the western world. They're pretty close to the Pandora as far as palmtop computing goes. They lack gaming controls and are not generally "open" systems, but that could be said for most handheld electronics.
An equally good question would be "Why hasn't anybody else
anywhere already made a system like the Pandora?"
Chip you are like a fountain of knowledge man will you do my taxes next year too