My personal vain hope is that tux3 will become an awesome filesystem and will become the successor to ext4. tux3 promises to support snapshotting.
So far tux3 looks very promising when it comes to the underlying design and the performance. But we shall see about features and stability when it gets closer to completion. And also if any of the added features will hurt performance.
Having worked directly with Daniel Phillips, it's lead creator... I am overly skeptical. His track record at finishing complex projects is not so great. Look at Zumastor for an idea
So far tux3 looks very promising when it comes to the underlying design and the performance. But we shall see about features and stability when it gets closer to completion. And also if any of the added features will hurt performance.