The new version uses most of the features included in GeneXus 15; just to name a few the whole site is Full Response.
There is a new Theme based on the Carmine. You can configure the desired colors using the Palette object; notice this Wiki is generated green; the Community Wiki is generated red.
The Recent pages section was completely redesigned, please take a look !
A new Table of content (TOC) Page type is introduced; you can check a sample here.
Check the new Builtin Templates added in this version
New relations between page have been added to model Page Branching and Page Precedence.
For edition options check here.