Think it's a wonderful idea and could work.
It would be cool if/when they make updates to the Winter Veil holiday event. I don't think we'd see it this year though. I think they put most of their work into updating the Haloween event (and making the new Darkmoon Faire).
On a slightly unrelated note: If you go to Dun Morogh, on Ironforge's western mountainside, then you can see a couple of dwaves who's sledging down the mountain (and then pulling their sledges back up again, and repeating). No skiing though :P