I wonder if CX will continue all 3 flights to the US now that the testing restriction is in place. Realistically no-one in the US will be able to get a test done within 72 hours and find a letter certifying the lab. Test results are taking a week or more right now in the US.
I wonder if the cargo can justify the route. The JFK flight isn't taking the most optimal route over the pole and its gotta be weight restricted normally. I'd say limited to 60,000 lbs at a guess with the lower pax loads. The LAX and SFO routes shouldn't be a huge problem for cargo, if they can find enough. UA is kicking butt on the cargo side of things and runs HKG routes out of LAX and ORD right now even if their pax flight isn't.