Use cases for hardware encoders in PCs:
- Video calls
- Screen/webcam recording
- Live streaming
- Real-time transcoding for media servers (don’t know much about this but I’ve heard it’s a thing)
- Game streaming
- Video editing (making exporting less frustrating)
Everything here is really niche, except video calls (and even that...).
In other words, unless on smart phones, don't expect broadly distributed AV2 encoding hardware.
If it does happen on PC, it will be most likely some courtesy of the hardware chip designers.