Well it seems they aren't pushing toward "serious work with text" based on this article. They are looking for devs to make apps, this means stuff like the NBA app, or games and stuff.

I think you are right about higher resolution being needed for real "work", but since this doesn't run a "real" OS either, i'm not sure how much work you could get done on it anyway.

It's a lightfield display, so 1920x1080 is very very optimistic. 640x480 is more likely.

Might not be mentioned because there's no actual pixel display?

Lots of things technically don't have pixel displays, like many CRTs. It's still basically doing pixels, and can give a number.