Digital Nomads are typically defined as people who earn a living through working remotely and live a nomadic lifestyle. E.g. staying for a few weeks here, a month or three there, etc.

"where careers ... are dead and gone, where corporations want employees to move around as serifs [sic]"

I guess I don't really know of any corps that make people move around constantly. I wouldn't count living in one spot for years as "nomadic".

"does that make us all digital nomads?"

Most people don't live nomadic lifestyles, so no. Maybe for a year or two before settling down, but I don't know very many people who really do travel often and live in a nomadic fashion.