They're calling it "live" and "near real-time" because they're aggregating the data from underlying sources daily, whereas traditionally that happened only on much larger time scales.
It's not very fast compared to most things often called "live", so perhaps it's not a great label for this demo viewer, but the goal of the project seems to be to make the data available for research, not so much for this map.
alt Hacker News
They're calling it "live" and "near real-time" because they're aggregating the data from underlying sources daily, whereas traditionally that happened only on much larger time scales.
It's not very fast compared to most things often called "live", so perhaps it's not a great label for this demo viewer, but the goal of the project seems to be to make the data available for research, not so much for this map.