To help illustrate the concept of new product development, pick a relatively new product and discuss whether you believe this new item will be among the few new product ideas which are truly successful.
This provides a good opportunity to address why companies spend a considerable amount of time and effort developing new products even though the chances of success are small. You may wish to discuss the new product development process and/or go through the marketing reasons for new product success/failure, as they apply to your product.