The HKG waiver updated yesterday and now allows you to
Change your origin or destination city to Tokyo Haneda, Japan (HND), Seoul Incheon, South Korea (ICN) or Tokyo Narita, Japan (NRT).
I'm a bit surprised since the US hasn't made any official travel advisory re: HKG, though with the extended cancellations make it hard to revise your schedule (though I presume CX has plenty of excess capacity). It would have been handy if they had allowed that change when the HKG cancellations started.