I will surely buy a physical copy.
That's because I'm just a fan of those, like to have something to touch and to look at and also love booklet designs and contents. On the other side I don't buy MP3s at all. I'm also a fan of bonus tracks (which are more often available on CD, if I recall correctly).
Besides that, I'm a fan of giving something in exchange to people who give me something, so "Narrrr, I am not a pirrrrate!"
Although I would consider a paid streaming subscription as such an exchange as well.
As I'll be in Japan anyways when the album is getting released, I will most probably fetch it over there directly at the record store, even if the Japanese edition is almost always considerably more expensive than the international one.