Probably a fix for the french speedcam issue. It will support have to support zones instead of specific locations for speedcams to comply with french law.
As for the MP3/ music side, I see three different whishes:
Playing MP3 from SD card - either from dedicated SD card or free space navgational SD card
Supporting a USB box fully - with MP3 tag support, map structure etc
The second seems easiest to implement and has been described in early manuals of the Myway. The first would bring the myway on par with the ordinary radio, but to my knowledge is never formally acknowledged by PSA. The latter would be logical as the USB box is a formal PSA product and there have been announcements of myway compatible USB boxes.
All 3 of them would be ideal. Enough to keep dreaming!.