yes indeed, this opens up new possibilities for monitoring what's going on in our bodies. But we would need more knowledge / education so we don't jump to conclusions when a value out of bounds.
Sure, but that particular ship sailed a long time ago. Most patients track their INR from the lab and simply ask when it swings too much.
We already monitor all sorts of anticoagulation. Fingerstick samples are particularly bad for this (even though there are current point of care devices that do this).