Yes, it replaces PulseAudio and Jack. Its goal is to provide a single audio daemon that can serve both consumer applications (where power consumption is typical

Yes, it replaces PulseAudio and Jack. Its goal is to provide a single audio daemon that can serve both consumer applications (where power consumption is typically most important) and pro applications (where latency is most important). Currently those are served by PulseAudio and Jack, so it's very exciting to have a single service that can cover both use cases. It also replaces part of ALSA, which is two things: the kernel interface to talk to audio devices, and a set of user libraries on top of that interface. PipeWire still uses the former, but has its own, better API for the latter (in addition to supporting ALSA, PulseAudio, and Jack APIs).