Our future will depend on reconfigurability. To some degree, it already does. Every memory pattern in our computers, cameras, and phones is based on harnessing a rudimentary form of reconfigurability – the binary storage of electronic charge. The power of reconfigurability has given us the von Neumann computer, mass storage, and the FPGA, along with applications such as software-defined radio and software-defined networking. But we have only scratched the surface of a vast frontier of possibilities in reconfigurability. Other forms of reconfigurability can be harnessed, and the ideas of the digital FPGA can be extended into many other domains, such as microwave, photonic, power, thermal, acoustic, and fluidic systems. We can engineer new kinds of reconfigurable systems, and we can expect them to have the same disruptive impact as the FPGA. In the future, what types of systems may we build, what qualities can we expect from them, and what demands may we place on them? What are the limits of virtualization? Can we future-proof systems, make them more resilient? Is programmable matter a possibility? How do we effectively manage this profound degree of flexibility, not just in the design process itself, but possibly while products are being used? How do we make such future reconfigurable systems secure?