Based on the available literature it seems that so-called "quantum radar" yields about a 20% improvement over conventional phased-array systems. This isn't quite the dramatic leap forward presented in the article. Moreover, quantum decohesion remains a significant limiting factor. As with a lot of tech, hype seems to have out-paced reality for the time being. Plus, any practical implementation will need several engineering developments that presently aren't available - there's a major difference between a proof of concept that is laboratory-based versus a hardened real-world piece of kit that can be installed in a high-stress environment. So quantum radar is some way off, in practical terms.