The Nissan IDx NISMO and IDx Freeflow are two concept cars from Nissan that make us wish the world was still filled with Datsun 510s. Nissan calls these two, products of the co-creation product development approach, which lets consumers have input into the cars overall design. Designed to appeal to “digital natives,” or those born after 1990, and integrates their feedback into the creation process. Nissan thinks this approach could have real applications in the near future. Check it out after the jump.