Subthemes, or template regions if you like
The reason why I will describe SubThemes here instead of below modules is that this concerns themes and will be a great enhancement to themes. A "sub theme" is template for zones that will create zones in a zone. For eg. if you want to add a 3 column template in standard Orchard more than once, how do you do that, well you can't. We can also describe this as a dynamic zone for regions that can be placed in a zone.

Imagine this default layout in Orchard:

                     |     Zone     |
                     |Zone|Zone|Zone|

                     

With subthemes you can do:

                     [Zone
                         [Each zone above can with regions contain:
                            |     Zone     |
                            |Zone|Zone|Zone|
                            |Zone|Zone|Zone| 
                            |Zone  |   Zone|
                            |     Zone     |
                            |Zone|Zone|Zone| 
                         ]
                     ]
                     (Zones with different content(widgets))

                     

With SubThemes you can define templates for any zone, and add widgets in any of those zones. Imagine a newspaper, the columns will vary on each page, and that is what I wan't to create. Templates can be repeated as many times you like.

Layout description:
When creating a new page I add a new button that say:
Would you like to create template regions on this page? --->>
In layout I define what zones I need. For eg. i want 2 and a 4 column on this page. I choose from a dropdown and click add those zones to the zone that is predefined.
Are you with me what I'm trying to do?