My view is that "selling SEO" continues at a record clip or pace. Most SEO folk will not discuss what they are selling or give metrics.
SEO does not mean your company will benefit. (ugly truth!)
Lot of things will be changing as the years pass by, so what could be the latest SEO trends of 2016-17 apart from article postings, guest blogging and etc.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic