Whenever new game hardware is released, there are the inevitable comparisons to the previous hardware. This isn't right or wrong or good or bad. It just is. And Nintendo's making that easier than ever.

Nintendogs, released in 2005, is a pet simulator in which players look after four-legged friends. Nintendogs + Cats, released this weekend in Japan, is a pet simulator in which...you get the point.

These games are not the exactly same, but they are similar enough to show just how far Nintendo's come since 2005 — and how much of a leap the 3DS is.