Is this something we are committed to fix this quarter? ie; P1 is current milestone.

Completing this is actually pretty ill defined. Bumping down to P2.

There's still work to do here, though we're making slow progress.

Any update on progress so far?

A somewhat outdated proposal can be found here:
https://docs.google.com/document/d/1_jKAyTvMN2xEDmqttozWDIWGfhSwecaDrkHZ0dWkOns/edit#heading=h.dwvjsxc3b2d2

We should have an updated explainer out by EOQ.

Tim, this looks like it can be marked as duplicate of issue 841224, right?

This was also intended to cover a Chrome input latency metric, which that doesn't.

I'll leave this open to track that work.

This work is tracked elsewhere.