Looks like a sharper screen (and in color), sync with SRM, and wireless transmission to others who also own the device.
Route navigation is also in there (think Tom Tom) if you get lost.
http://www.gizmag.com/go/7911/
Apparenty Garmin is also going after motionbased with a new website, too. Hopefully this will motivate MB to add some badly missing components/features.