Mobile phones have become ubiquitous devices that are capable of much more than phone calls due to increasing processing power, storage, and apps. While many music apps simply replicate desktop instruments on mobile screens, there is potential for mobile phones to enable truly new forms of musical expression and cultural practices if certain conditions are met. For mobile music performance to become widespread, the interface would need to be intuitive, mobile music would need to play a natural role in socializing, and the practice would need to be seen as cool rather than gimmicky with support from companies and grassroots movements online. Historical examples show how industries like piano and recording transformed music when they disrupted existing cultural norms and business models.