Here’s a short, interesting write-up on Oblivion and its open matte version:

But the real magic? The open matte doesn’t feel like “more picture”—it feels like the intended picture. Kosinski, a former architect, packed the frame with vertical lines: dripping water towers, launch cradles, the 200-foot “Memory Wall.” In open matte, these elements breathe. When Jack climbs the drone tower, you see the full ladder stretching into the sky—and the lonely ground far below.

When Joseph Kosinski’s Oblivion hit theaters in 2013, audiences were mesmerized by its sterile, gorgeous apocalypse—a world of shattered moons, chromium towers, and endless white drones. But for years, home video releases framed Tom Cruise’s Jack Harper in a classic 2.39:1 widescreen, cropping the top and bottom of the image. Then, a hidden treasure surfaced: the version.