MP3, MP4, MP5, MP6, MP7 evolution with question HD Wallpaper

The image displays a progression of items labeled MP3, MP4, MP5, MP6, and MP7 in red silhouette against a black background. The MP3 is depicted as a portable music player, the MP4 as a smartphone, the MP5 and MP7 as firearms, and the MP6 as a question mark. Below the items, the text "WHAT HAPPENED TO THE MP6?" is displayed.