I thought X was on its way out?
Try this (the two mentioned commands come with the gtk3 package):
- In one terminal, run 'broadwayd'
- In another terminal, run 'GDK_BACKEND=broadway BROADWAY_DISPLAY=:0 gtk3-demo'
- In _your Web browser_, go to http://localhost:8080/
- Reattach jaw
What could be a real use case for that
This has already happened for ALSA with some applications. If you want to use BlueZ or Firefox, your options are either PulseAudio or no sound at all under Linux.