This -No Apple devices has ever had both.Maybe because the IPad Pro has its own enclave and it is programmed to work with faceid
The thing with Touch and Face ID also is that, besides these new keyboards, you can’t remove or replace the sensor/camera(s). Touch/Face ID is tied to the device and forces you to type of you ever break the sensor. It’s not perfect, but it does add security
For these new iMacs to as safe as iPhones, iPads, MacBooks, the Touch-ID keyboard should be tied to the iMac somehow.
I’m assuming Apple has already thought of this. But it’s going to be interesting to see what it takes to unpair and bypass it.