This thing is cool. I saw a live demo at IETF 118 in Prague last month. It totally eliminates buffer bloat, which makes it awesome for video chat. I saw the demo and was like "woah... I didn't think this would ever be possible." It requires an additional bit to be inserted into IP packets, to carry information about when buffers are full (I think?), but it actually works. It feels like living in the future!
It took a bit of searching, but I assume this is it? https://youtube.com/watch?t=4900&v=RWjbrXxpzVU (1hr21m for anyone whom the time link doesn't work for) EDIT: Never mind, that's their hackathon recap. Still searching, this is not an easy conf to find talks for!
What I saw wasn't in a talk; it was a 1-1 in the hackathon demos room.