So far we had:
Ring sig as in Monero -> Obfuscate the sender, amount visible
Confidential transaction by gmaxwell -> Hide amount, sender visible
Now we have both together. Moar privacy

This seems like a really elegant and useful work, I'm super grateful to Shen.
Don't forget stealth addresses for each output -> Hide the receiver.
So SA+RS+CT = Hidden Sender, Hidden Amount and Hidden Receiver.
Edit: Looks like its even more than that. As the author (ShenNoether) put it:
Amounts would now be hidden so your set of potential ring partners is much larger.
and
... it will mean hidden amounts, origins, and destinations, while viewkeys will still work, and of course it will still be auditable.