The highest resolution of the PJD5151 is SVGA (800x600). That's 77% less resolution than the most frequently found native projector resolution of 1080p (1920x1080).
A SVGA (800x600) native projector resolution is in fact the worst resolution across all multimedia projectors that have been on the market for around the same time as the PJD5151.
A WUXGA (1920x1200) native projector resolution is the best resolution across comparable types of multimedia projector.
We compared all the other projectors that have a resolution of SVGA (800x600) to this multimedia projector and we think the Optoma S331 which is cheaper is also worth considering.
If you want a data projector with a higher resolution then you might also want to consider the Optoma H183X ($429.26) (WXGA (1280x800)) which also has a higher Rating.