Game freak said it would be the end after the original gold and silver. But due to its popularity the company kept at it. After the 3ed gen the company said it would keep going for as long as it could keep its popularity up.
Gen 5 was an attempt at getting back to its younger fan bass so i see gen 6 as about the same. So long as kids enjoy and their parents buy the game i see no near end to it.
