Like the stick, the throttles control electrical and hydraulic systems. The retrofitted controls on the DDGs will do the same.
Not like the old days when the throttle on the bridge moved a nearly identical indicator in the engine room. Then the engineering officer would shout out the engine throttle.
Agreed. The biggest value in having physical throttles (whether mechanically linked to the actual engines/motors or not) is the operator knowing, without question, what input he is providing to the system.
You just don’t get that with a touchscreen.