No and no.
The customer most likely cannot tell you what the next product should be or where competitive advantage can be found. Input from customers is often superficial and short-sighted. Henry Ford used to joke that if he had listened to his customers he would have built a faster horse.
The key is not to just listen to and follow the customer, but a deep-seated understanding of the customer’s needs, behaviors, and dissatisfaction with current alternatives. Attention to lead-users and lead-innovators will also provide insight to the future needs of customers.