I've heard omega thrown around a lot. I doubt it will be cut and dry, though. I've heard the start of generation Z range from 1990 to 2008, so I can't even imagine there being solidarity on what to call the next generation.
I'd go with "On Beyond Zebra," by Doctor Seuss, for the naming of future generations. So the one after Generation Z could be called Generation Yuzz.
(and the last is just an image with no name but it looks cool)
Alas, now, I'm jealous. I want to be part of the Snee generation but am only experiencing a random, undefined Itch!!!
from the Queen of Silly