The .hack//GU Trilogy is coming to DVD and Bluray in March. It had a short theatrical run earlier this month, I believe, which caused them to push back the release date of the DVD from Jan to March.
It supposedly is a retelling of the three .hack//GU games, but from the trailers, it seems that the story may play out quite differently. Whether this is a good or bad thing remains to be seen.
The movie uses the same graphics engine as the game, so do not expect it to be killer-quality CG. Probably it will animated on par with the best scenes in the game.
Same voice actor on board, etc., etc. I am looking forward to this movie, as I enjoyed the GU games very much.