Opportunities, that would be opened:
- Ghostproduction Websites (there too shitty templates on the internet at the moment)
- Music Bands.
- Media like Pitchfork (that are using fully custom Soundcloud player)


The main feature of this player is that it should be Fully Customizable.
This player can be common mp3 player, Soundcloud player, Player that stream music from different services. 

Here are examples that may be used as references:
1. GitHub and Demo
2. GitHub and Demo

It is not hard to implement, so this would be a great and easy-to-make feature, especially because there are no visual web-site builders that provide customizable player at the moment.(there are few that use soundcloud player, that looks like a shit anywhere except Soundcloud itself)