This year people want to know what real place is there for replica optics in components and systems, and also in the market place. This paper addresses a sharp concern for the actual utility of replication as a viable process for designers and fabrication experts. What replica optics are actually being made? How does one identify a good replication capability? What measures can be made of capability, and what total outcome can be expected? Technical aspects of the replication process are explored, and examples given of components and systems. The design of substrates, tooling, and masters is discussed. Considerations pertinent to scattered light, reflectivity, stability and accuracy are given special treatment.