The Oscar winning title The Departed was the first high definition title that has sold over 100 000 units. (Note! units sold not shipped).

“It’s no accident that Warner is the first studio to reach this benchmark. We owe this success to a combination of great content and our decision to support both high definition formats… By releasing titles on HD DVD and Blu-ray, Warner Home Video not only increases our potential audience reach, but also offers consumers assurance that regardless of the format they choose they can enjoy our movies.”

Warner Says ‘Departed’ is Most Sold High-Def Title [highdefdigest.com]
via [Gizmodo]