We have plans to support multiple monitors. It could work even now, although by optimizing it we could utilize the resources much better, which in turn could allow us to manage more displays from a single computer.
In our case the scalability should be much better than with FSX, as our bottleneck isn't in the CPU->GPU bandwidth. Outerra creates terrain from mathematical models and vector data layers that are tiny compared to data needed in FSX; the workload lies on GPU which has a much higher internal bandwidth. With multiple GPUs in SLI configuration we could divide the tasks among the cores and synchronize the produced data, resulting in better parallelization than with using multiple computers with a single card.
