Now this is interesting. I just had the following reply from Apple's support chat:
Just another minute.
We don't offer an optical port,
because today's technology would do that wirelessly.
No need to downgrade the sound with cables.
I have however found a future solution for me as I just discovered the AirPort Express base station offers the good 'ol audio minijack with both analog/optical outputs. From what friends have told me in the past, the support staff receives their detailed information on new products day of release, so perhaps there is still some confusion on their end over whether or not the headphone minijack is both analog/digital. Looks like i'll just have to purchase the Retina and report back 😉