The Optoma ES556 supports a better supported video mode than most projectors of a comparable spec and age to it. This projector supports a 1080i video mode, whereas most multimedia projectors that have been available for around the same time as it support a 720p video mode. This multimedia projector also support 1080p, 480i, 480p and 576i and 576p video modes.
This projector's supported video mode (1080i) is in fact the best supported supported video mode across all similar spec projectors that have been on the market for a comparable time to the ES556.
A 480p video mode is the worst supported supported video mode across comparable types of projector.