Read the Phoronix article and the discussion on mythtv-users.
Did a quick search and found this on the Schedules Direct website
http://www.schedulesdirect.org/approvedsoftwareQuote:
Torc is an open source DVR based upon the venerable MythTV codebase. Torc aims to deliver modern features such as fully hardware accelerated user interface and video playback, complex OpenGL shader-based UI effects, blazing fast UI, and a ground-up rethink of various media management plugins to deliver the experience users expect, while maintaining the same featureful recording functionality that has made MythTV the premiere DVR for linux. Torc embraces the cross-platform experience and will deliver solutions for all standard platforms, tablets, and mobile environments.
Not sure where this description comes from as I don't see it anywhere else on the web.
