The default start screen has been changed. You can now start a new wave containing some prefilled content.
Templates are not something new The Shiny Wave had a post about a user contributed list of Wave templates. I’m not sure if any of the templates from the project has been reused. But some of the ideas have. The difference is that with this new addition you do not have to find a wave template and the create a new Wave based on this.
An example of this looks like this.
The idea is fantastic, it will allow you have some much better synchronized and harmonized waves. It seems like it is missing the option of adding your own templates to the list. It could be some extensions you added or something defined in your Wave for your Enterprise.