The second half of your list could be achieved through software updates I guess. and I believe HD radar isn't part of HW4 on MYs/3s following the latest news over the weekend... so it would be just about the exterior/interior redesign..No idea. maybe any or all of
HW4
New Cameras?
HD radar?
functioning USB ports
Proper matrix LED functionality
Working windscreen wipers
interior changes / upgrades
The ability to turn off the vents on the passenger side of the car at will
personally I would quite fancy vented seats which lots of cars in this class have
Though who knows maybe they will just use it as an excuse to take off more stuff like the stalks and the top and bottom of the steering wheel?