I believe the correct term would be "Product Life Cycle" as with the introduction of any new model, the sales will increase (provided it is not a bomb) at an increasing rate for a period of time. Then the manufacturer has the option of watching sales increase a decreasing rate, sales drop or make a change that will make the sales increase once again at an increasing rate. (Redesign or new model)
This is what the auto manufacturers feed off of. Basically what it is doing is making everyone wanting the latest greatest. The side effect is that it kills the resale of the boats that are not the latest greatest as it makes them less desirable to the consumers.
I believe Fountain has been very successful with this same approach as while the deck does not seem to change much the bottom really does and in a quest to have the fastest boat, they are selling new models. Else, why would anyone every purchase a new boat if it is going to be the exact same boat as their current one?
Each of these changes starts in effect a new product life cycle for that particular boat.