Rethinking the theme layer for Drupal 8

This conversation is to discuss a new theme layer for Drupal 8.

Everyone's frustrated by theme development in Drupal 7. It's confusing, inconsistent, and just too hard to learn.

We've decided to build something better at a sprint April 20th - 22nd, and this conversation will be to discuss our success or failure at that attempt.

Referencing information:

1) John Albin's core conversation:
http://denver2012.drupal.org/content/re-thinking-rendertheme-layers

2) Jacine's blog:
http://jacine.net/post/19652705220/theme-system

3) Nate+Jen+Carl's session proposal:
http://denver2012.drupal.org/program/sessions/token-templates-new-templa...

4) Kris's blocks/layouts/context initiative:
http://groups.drupal.org/drupal-8-blocks-layouts-everywhere-initiative

5) Chx's core issue:
http://drupal.org/node/1499460

Track: 
Core Conversations