They already have had confirmed cases of AHB over wintering in Ohio, New York, and Maine.
Yes, they swarm to the point that they probably will not have enough to survive a long winter here in the north, left to their own devices.
But bring them up on flatbed truck, or through queens and packages, and then provide them a nice hive with 80 pounds of honey, and they over winter very nicely.
The map that is mentioned means nothing as to where AHB are, other than perhaps letting beekeeper know where and where not, they should be buying bees. It's one thing to understand that AHB will survive in any hive that a beekeeper does not requeen when nasty. Feral AHB in the north many not get a foothold beyond beekeeper ignorance. Feral colonies will probably die out until they adapt, which I'm hoping will be many years. But it is another entire circumstance understanding that AHB in feral colonies in the south make for a larger problem for breeders and beekeepers alike. And the passing of AHB is a real possibility.
I think there are probably positive traits to AHB that hopefully in the future we may benefit from But in an industry that had to cease the USDA's program with the Russian program due to a lack of funding, I see no real possibility of a large scale program that may be needed to coordinate and breed long term beneficial AHB bees. So it will be left to nature's slow progression, possibly a few dedicated beekeepers efforts. We will be left with advocates for and against AHB bees and the never ending discussions until every bees is leveled out in the genetic matter we have. Some will state that they are harmless and some will raise red flags with every AHB discussion.
For perspective, since the introduction of AHB in the U.S., there has been less than one death per year attributed to AHB incidents. Better chance of being struck by lightening. But those deaths have always been where AHB have been already found or just discovered. So there is some truth to agression, etc.