I also sent them an email and here's what I heard back:
Thank you for contacting PlayStation® Technical Support. My name is Cxxxxxx and I will be assisting you today.
I apologize for the inconvenience, however, Sony Computer Entertainment America LLC (SCEA) has not released any details concerning the Dolby TrueHD referenced in your email. SCEA and its affiliated companies are regularly engaged in extensive research and development in many areas of the computer entertainment industry. Hence, we cannot comment on future PlayStation® developments, projects, or products. We appreciate your enthusiasm and continued interest in our products, and hope you understand our position. You may however, visit our website at http://www.us.playstation.com/
and view our current press releases and future updates.
At this time, since we have not released any information about an updated audio capability, we can not confirm or deny any capabilities any future systems may have. If you would like to submit your ideas for future consoles please feel free to submit your idea at the following URL to ensure we successfully receive your suggestion:
We are constantly updating the Playstation®3 system, and trying to improve that system. We come out with new features and accessories, such as the Playstation®Move and PlayStation®Plus, and we are continuously trying release updates and features that benefit our customers, and at this time, that is our focus. Again, if we do release any information about using the Dolby TrueHD, it will be officially released on the website or the blog, so please keep updated with those two sources to see if there are any updates about future releases for our Playstation® line of products.
We appreciate your enthusiasm and support for our PlayStation® family of products.Thank you so much for your time and understanding, as well as giving me this opportunity to help you today, t*****.
PlayStation® Technical Support