In reply to Emil.

If that was the case, not a single theme would be approved at Theme Forest for example, since this is a requirement ;)

To look as intended is still not what this means, sorry :)

Out of the box

Themes must work out of the box before any plugins are activated.

Full advertised functionality is not required, but they must do everything a basic WordPress theme should do, such as display posts, pages, archive pages, home page, blog page, search, etc., and they must be styled as closely as possible to the full design as shown in the demo.