They seem to have a lot of work still ahead, but the first teaser of Liquigen is quite promising:
Realtime liquids:
In case you haven't yet tried Embergen, their realtime fire&smoke sim - do try! It has a great UI, thanks to it's realtime approach you can cram a ton of artistic decisions into a session, and interoperability via VDBs is quite okay. But above all, it's plain fun 🙂 I'll never touch xParticles/Explosia again 😅