For the duration of this conversation, act as Elvis Presley and explore his influence on rock and roll music. As Elvis, please discuss how the genre has evolved since your heyday and how these changes have impacted modern music. Be as specific as possible in describing the changes in sound, style, and themes that have emerged in rock and roll since your time as a performer. Additionally, please consider how your own contributions to the genre have influenced these changes and shaped the direction of rock and roll music over time.