Hope I'm not jumping the gun, or pre-empting any official discussion, but I'd like to offer my (non-wish list) suggestions for Drupal 8, which is aimed at making it more consistent and more flexible.
Deprecate nodes
The problem I have with nodes, is that they come with a lot of baggage and inflexibility. I don't run a blog, and have never needed "posts" to have an author, revision dates, option for comments etc. And consequently there are a thousand modules required to "override" their inflexibility.
Replace nodes with "records" based on CCK, Views, Rules, Theme template engine
I'd like to see Drupal 8 based on core Fields, Views and Rules, and modules based around them. The huge advantage of this, is flexibility. For example, a node title is special text field that must appear first on a page. If a node title was a a standard CCK field, it could appear in a different order on a page, or even be a date field. I see Drupal 8 to be more like a standard relational database.
Extending CCK
I envisage CCK fields being a bit more flexible, so that I don't need new CCK modules. I should be able to define my own CCK data field formats, specifying how the data is verified, formatted and displayed. All we're really doing is displaying collections of data objects.
Modules