That wiki's definition is simpler than I'd thought possible. But a "new market" includes a new group of people (doing the same old thing), and the same people doing the same thing in a new way (e.g. people with landline phones using cell phones).

Just in the comments here are mentioned: low-hassle machine for grandparents (which the HNer has to admin, who influences the decision); low cost and low hassle machine for school kids (which the school has to admin, an who decides); second or third backup machine; machines for the developing world; for people working mostly in chrome browser (which is faster than on Windows), which includes most of us, and some HN even dev in web IDEs.

Cheaper + low-hassle + web-optimised also makes them attractive, to almost everyone.