With the recent announcement of the release date for Quantic Dream's new game, they also unveiled the new logo.
The changes are fairly drastic, with the font completely changing and both the "B" and the "D" are now full letters and the slash effect crosses over 3 letters instead of the letter "O". It's hard to say why they changed it, perhaps the original logo and its letter "B" looking like a number "3" was a major factor. The font is also chunkier and now more similar to games such as Far Cry 3 and Tomb Raider.
Beyond Two Souls will be released on the 8th of October 2013.