That could be so; I think someone did show a high replacemt-parts cost for new compared to old headlights, but i dont recall the specifics.Either way, if the projector HL are as advanced as people say, there should be a higher cost, possibly significant, per unit.
OTOH, the beautiful thing about technology is that new and much more capable systems can come in cheaper. Capability increases and costs decrease over time.
In this case, the LED matrix is a monolithic chip replacing several separate LEDs. The projector housing and optics are modified but not very different from a single-emitter projector, and BTW don't need the extreme-temperature resistance of the older incandescent, halogen or xenon-discharge lamps. (LEDs produce much less heat but cannot themselves run super-hot, which is why you ofter see a finned heatsink integrated into the assembly).
The very first examples of adaptively-dimming lights that I read about used a very coarse 1-d array of electromechanical vertical blinds or shutters; that would surely be a more expensive yet inferior version of adaptive beam control.
I don’t know how the matrix control is communicated to the headlight, my guess would be CANbus that I think is already used for dumber headlight control, but a lot more bandwidth is involved so there could be a costly dedicated comm harness. Here is a paper I found discussing the strain on the present-gen CAN bus.
https://www.google.com/url?sa=t&sou...FjADegQIBxAC&usg=AOvVaw2Y1x7roAq3qRBJxHiICDjl