People want gamification to mean certain things to them. They want to take the word and try to bend into whatever they think will sell their next big idea to someone. This tends to lead to people arguing about what it actually is and what constitutes a gamified product. Two such ideas seem to be Playful design and Serious games. Some think that they are gamification, others that they have no place near the word. Personally, I think we should stop trying so hard to define a made up word and just start learning what we can from the people who use it!