The C suffix stands for Chromebook.
Last year AMD launched
9220C and 9120C APUs that were used just in Chromebooks.
The 9220c also found its way into many windows notebooks, although it certainly found its way into many chromebooks as well. I own a lenovo 14w, a windows based 9220c machine.
They were also not really 'newly launched', as they are based on 28nm bulldozer/excavator cores using integrated radeon r5 graphics cores, 2 and 3 respectively. Since these also use the "well its sort of two actual cores" model of two integer units with a shared fpu and memory controller that AMD settled a lawsuit over just last year, its not even a real dual core.
Zork was a text based adventure game from the 1970's. It was also a common term among MIT coders as a placeholder name for some piece of code that wasn't quite production ready and "wasn't ready for a name yet". In the game, you had to navigate a world, defeat or avoid bad guys, get around obstacles, get out of mazes, etc. All by text, using your imagination.
So could be quite a few vectors for the name, from "this isn't finished yet so it doesn't get a name" to something having to do with the game.
My wild a-- guess is they're next gen tv boxes, given the low power demand, smaller core counts, etc. Google has been rumored to be releasing a new chromecast/google tv box with a remote. It could also be for a 'google home' type device or combo device (router/home/home control) built to do more in-home processing and less 'cloud processing' to improve peoples perceptions of security.
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