With the newest update for the PS4, custom wallpapers are now a thing. If you are lucky enough, you have some great screenshots you can use as a background. If that is not a case, PSU has you covered. This site has a diverse listing of shots you can download and use as your background on the PS4. The only downfall to this is the inability to change the music that plays. Maybe we can look forward to that in a future update. The PS3 had some epic backgrounds that could be downloaded that included sound effects related to the theme. The directions to do this can be found here. Some of the screenshots are 4K, and the website will be updated with new ones over time. Certainly check the site out if you are looking for more options for a background.