Just armageddon (not the literal one, natch) through cyber means?
This reminds me of the 90's when people would prefix things with "e-" without a unified definition of the monkier. "E-mail", "E-file", etc...
If I had to guess, I'd imagine a "cyber-armageddon" as some sort of problem directly affecting logical electronic infrastructure. Imagine simultaneously wiping out all copies of DNS records everywhere (including hosts files) through some mysterious malware, blowing up a bunch of datacenters, and a Sony Pictures-like virus that hits Google and wipes out all code backups. That might be a "cyber-armageddon."
That would suck, and would cause quite a bit of culture shock (and, of course, would be a catastrophic economic event), but it would not be the End of the World.
On the other hand, an EMP attack against the United States which disables/blows most non-hardened electronic equipment and causes a quickly-cascading North American power system collapse everywhere all at once would be a *true* (figurative) armageddon. That's really what I think of when dealing with continuity of government plans and "dire threats". American society would find a way to survive without the Internet (although true, unprepared Millennials might suffer debillitating levels of shock). American society would probably *not* find a way to survive after a few months of a power and communications outage, however, at least in its current geopolitical form -- and especially if a power vaccum formed internationally. (Think "Revolution" without the hand-wavey, future-science gobbledygook.)