I think the future may be CMS-style applications that do static publishing. Either run locally (may be a great use for electron actually), and/or as a service. At least in this space competitively, the biggest complaints tend to center around the amount of manual configuration/changes... opposed to the overhead of say wordpress.
The only downside to static publishing to say S3/ABS is that you loose server-side analytics to some extent.
But then, couldn't you insert the google analytics javascript snippet within the html that gets loaded/served up from S3? Or did you mean something like piwik? I have to think S3 would not be a block here, as many users of static site generators also use some sort of analytics tool.
There are bits that JS based tooling will miss in terms of a bigger picture... they don't represent your real load when you run a site that is getting hit by a lot of different smaller search bots. Of course, once you're on s3 or a similarly cheap static delivery option (and/or CDN), you may not actually care.
The only downside to static publishing to say S3/ABS is that you loose server-side analytics to some extent.