I've used Lektor recently and I think you're missing its main advantage: it does NOT aim to introduce web dev to non developers or to dramatically simplify the process of wiring up templates. In fact, its use of models is an additional step in the traditional process for static site generators.

BUT...once setup by a developer, Lektor's structure and Mac app allows a non-technical user to edit files and publish changes to a website, which can be hosted on S3 or other options for peanuts and has none of the security issues that afflict Wordpress.

So viewed through the lens of a potential replacement for Wordpress, I think Lektor is pretty phenomenal. The idea of a Static CMS--whether Lektor can pull this off or not--just makes so much more sense than our current CMS model.