Is this projector capable of 1080i resolution? 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?
Yes

Most projectors support multiple resolutions.  The specifications list all resolutions supported by the projector.

The projector you are asking about will handle 1024x768, 480p, 720p, and 1080i.