Keep in mind that the future towing capability could be just for Europeans - frequently a car sold both here and Europe that is mechanically the same (as far as anything that would impact towing) often has a much higher tow limit in Europe. For example, a Subaru Forester there might have a tow limit of 4500-5000 lbs, where as here it could be something like 2000 lbs. In some cases, cars here don't support towing at all but over there it might be 1500-2000 lbs (identical vehicle less steering wheel on the "wrong" side, etc).
I think it has something to do with their restrictive, well-enforced speed limits for tow vehicles.