This was inevitable, I suppose, but big increase in the number of people driving around in the US this weekend in almost every state (we're the gray line). Not much increase in transit use, however. apple.com/covid19/mobili… 
What predicts mobility? Basically three things. Partisanship (people in Trump states moving more relative to their pre-COVID baseline), weather (people in states with a larger summer vs. winter temperature change moving more) and urbanization (people in rural states moving more).
Whether a state is technically "open" doesn't seem to matter much in predicting driving mobility. I'd previously found the number of COVID deaths in a state was predictive (people staying home more in states with high per-capita death rates) but that effect seems to have faded.
