[edit: sorry, I must be blind! The OP graphic says that the USB is for MIDI in/out, audio, and reamping capabilities! BAD ASS! How did I miss this? Well done, GK.]
I'm going to guess no to USB audio. Otherwise, GK would be highlighting this as a feature, don't you think? More likely for other computer functions, or to provide power to an external USB device such as tablet/ipad/iphone. I'm interested to see the USB implementation. In my wildest dreams, I'm hoping that it is for firmware updates, computer editor, and to upload various different cabinet emulations (if they are using impulse responses for the cabinets). That may be going a bit too far, though. LOL.