From the specs of the projector:
DLP - 4000 lumen - 1024 x 768 - 480p - 720p - 1080i - 3D Ready - 6.4 pounds
They state the resolution is 1024x768, but then they add 1080i, from wikipedia:
The term 1080i assumes a widescreen aspect ratio of 16:9, implying a frame size of 1920×1080 pixels.
I'm a bit confused, what the resolution of this projector?