I had this kind of discussion with people who make good money managing digitalization projects.
Under the term "digitalization" (somewhat confusingly) companies understand "make (often service) X available via the internet". Similarly "digital" means "connected to the internet" (i.e. punchcards are not digital :-) ). This is a different usage of these terms than in engineering, but this usage is rather consistent.
The term "natives" in "digital natives" refers to the fact that this is the first generation for which (rather consistently available) internet was something that they grew up with from very early childhood on, i.e. they "never saw the 'old world without consistently available internet' in their life". Whether this is bad or worse for work can be discussed endlessly ... ;-)
In this sense/usage, from my gut feeling I would thus argue that "digital natives" refers to "from late Gen Y on".