Improved networking and sensor processing is one big avenue of improvement. Low observable designs typically do the majority of their heavy lifting by 'deflecti

Improved networking and sensor processing is one big avenue of improvement. Low observable designs typically do the majority of their heavy lifting by 'deflecting' radar beams away from the source. This means distributed systems of transmitters and receivers, networked together with enough compute oompf could potentially do a much better job at detecting and tracking. At the absolute bleeding edge of radar technology (like... probably decades and decades out) is developing and deploying quantum radar systems (these use entanglement to try to increase signal to noise).