I would have concerns about how they would fair on hard cornering.
Yeah. That wont play well in the snow. Getting a few pounds of slushy ice mix lodged in there will throw the wheels so far out of balance it will make driving feel more like trying to ride a bull.
“They have airless-tires in development for cars, but they are pretty odd looking”
Tires are part of the suspension system (small part) it will be interested to see how Car manufacturers compensate for no air tires if they go that route.