While overall capture quality of the clips is low even in Bungie's own HD version, there are plenty of edges to measure and all of them seem to point towards a native resolution of 1152x720 for the new engine - a significant upgrade over Halo 3's 1152x640. Anti-aliasing doesn't appear to be employed, but the improvements in post-processing effects and resolution should make this far less noticeable than it was in Halo 3.