Steve Jobs Designing the Next two iPhones: Good or Bad

According to this report on the website MacTrast Steve Jobs was directly involved in the Design of the next two iPhones, it isn't the first time that is was rumored that Steve has had his figures on the designs of future Apple products. My Question is, is this a Good thing? Steve Jobs was a Visionary thats known, but if Apple is still living off of the designs of the late Steve Jobs what will happen when they run out of Steve Jobs designs. Also that means that Tim Cook's "idea" of were Apple products are going are just Steve Jobs designs, and he isn't a "visionary" leader.