Starting with several revisions to the PlayStation Store, this firmware brings a number of useful updates. The PlayStation store sees a redesign that should make things far easier to find. As a gamer you also get the opportunity to preview the content you are about the purchase with a range of screen shots and/or video previews, lastly a shopping bag will allow you to track all of your past purchases.
You also get the DTS-HD Master Audio support for Blu-Ray movies that allow the PS3 to output audio in high-bitrate form to up to 7.1 channels. Obviously that was a feature pushed by Home Entertainment geeks, not so much gamers.