I'll bite since I'm a sommelier.
Personally, I'd like to see AC show case Canadian wines in the lounges or maybe for a few routes, say top 10 most popular.
Doesn't have to be the entire selection, but maybe out of 6 wines, 1-2 are Canadian. By Canadian I mean VQA, none of this cellared in Canada plonk.
YVR/YYC based flights wines get BC wines, and YYZ/YUL could get ON wines.
I actually don't often have wine on board, because it's just plain bad and I'm usually travelling to a wine region.
Unfortunately, I doubt it'll change from low end wedding wine anytime soon, but do hope to be wrong.
If the wines weren't so damn overpriced in duty free, i'd have no shame popping open my own bottle. I actually travel with my own travel wine glasses.