We'll have an official announcement up in a moment but let me clarify that you guys shouldn't feel disheartened that it's coming to XBLA.
It's structured like a full release complete with a pretty damn impressive storyline that expands the originals in some interesting ways.
I really enjoyed it so I'm sure you all will too!
EDIT: Announcement just posted up on FB:
https://www.facebook.com/alanwake/posts/266945656676473