I like buying all my stuff on disc; I'm not depending on a studio to always allow me access to that digital copy I bought. Publishers can and will yank your access; it's already been happening with eBooks on Amazon. Then what do you have? Your money gone and no product.
If I've got a disc, I can watch it. They can't take it back from me without breaking into my house.
That said, here's hoping that Canada will do a bluray of season two; there's no hope of seeing that in the US.