The evolution to Manycore platforms is real, both in the High-Performance Computing domain and in embedded systems. If the authors start with ten or more cores, they can see the evolution to many tens of cores and to platforms with 100 or more occurring in the next few years. These platforms are heterogeneous, homogeneous, or a mixture of subsystems of both types, both relatively generic and quite application-specific. They are applied to many different application areas. When they consider the design, verification, software development and debugging requirements for applications on these platforms, the need for virtual platform technologies for Manycore systems grows quickly as the systems evolve.