The "Open Matte" aspect is a novelty. It is not superior to the official 4K BluRay in terms of color depth (HDR), but it is historically fascinating. If you want the purest version, get the 4K disc.
However, I don’t have direct access to specific warez scene releases or pirated content. What I can do is give you a of what each part of that filename likely means, and what you should expect from such a release. i robot 2004 open matte 1080p bluray x265 h 2021 portable
Most viewers are used to the 2.35:1 "letterbox" format of I, Robot . While cinematic, this widescreen format crops the top and bottom of the frame to create a narrow strip. The "Open Matte" aspect is a novelty
: Indicates a file size optimized for mobile devices or tablets, typically featuring a lower bitrate for easier storage and streaming. Why Watch the Open Matte Version? However, I don’t have direct access to specific
No mention of audio track in your title, but the copy I found had AC3 5.1 – serviceable, but lossless would’ve been nicer. Marco Beltrami’s score still hits hard during the tunnel chase.