Drupal 8 has a new theme engine: Twig. Twig provides several advantages over PHPtemplate, our previous theme engine, including: Security, Performance (probably), and Ease of Use.
In this session We'll point out some of the problems we faced with PHPTemplate and Renderables, and show how these issues are being addressed through the move to Twig. There's still a lot to do, and some things we still haven't decided on yet, but we're definitely making progress.
Come see what template files will look like in Drupal 8, and learn how you can get involved in making a better Tomorrow for your favorite CMS.