The world I experience today is not the one that I remember as a kid, or the one that I recall just a few years ago. The age of mobile, ubiquitous computing has begun. Powerful computers embedded in networked, mobile personal devices are transforming how, where, and when people use computing technologies. Computers are becoming increasingly pervasive and invisible (to our awareness). No longer tethered to the desktop, mobile phones and tablet computers are free to roam in everyday life with their human users while persistently connected to the network and aware of their location. This combination of powerful mobile devices and the connective potential of cloud-based computing present immense potential to reshape the way we engage one another socially, creatively, and musically. This revolution will not be only technological in nature – but also psychological. Computing is becoming less deliberate, less static, and increasingly ad hoc, on-the-fly, and context-sensitive to physical interaction, location, and social relationships. As computing paradigms shift, opportunities arise for exploring new musical interactions that take advantage of the scale and pervasiveness of new technology, leading to musical experiences that are not only "mobile," but also were perhaps never possible before. Might we find new modes of social-musical expression? Can we create new music-making experiences for a planet, involving millions or perhaps even billions of participants? I look forward to exploring all of this - together.