The highest resolution of the Optoma S311 is SVGA (800x600). That's 77% less resolution than a 1080p (1920x1080) multimedia projector, which is the most frequently found resolution.
A SVGA (800x600) projector native resolution is actually the worst resolution amongst all 20000:1 contrast ratio projectors that have been on the market for around the same time as this multimedia projector.
Amongst comparable types of projector the best resolution is 1080p (1920x1080).
What does "projector native resolution" mean?