The person delivering the brief At between 31.45 - 32.35 Mentions a silicon Interposer He then says:

" that’s the secret sauce, we won’t talk much about that because it is the secret sauce".

Interesting also is the numerous mentions of power consumption and the staggering amount of heat to be managed.  There is clearly opportunity for our GaAs tech re heat and efficiency  but then architectures simply don't change that quickly.

There was to be a section on the photonics but that did not appear in this video, must be out there somewhere.

sula