It's literally DARPA's job to fund pie in the sky projects, in the hope that maybe some of them might be practical. The internet was born of a DARPA project, S

It's literally DARPA's job to fund pie in the sky projects, in the hope that maybe some of them might be practical. The internet was born of a DARPA project, Siri was made with technology spun off from another. Project MAC was filled with groundbreaking research and development of AI and operating systems. All modern operating systems can trace their lineage back to Project MAC. The origins of GPS are also from an earlier DARPA project. Most DARPA projects will never be used in an operational environment, but the technology discovered and lessons learned inevitably find their way into other projects and technologies.