The highest resolution of the Philips PPX2330 is nHD (640x360). That's 78% less resolution than a WXGA (1280x800) projector, which is the most frequently found resolution.
An nHD (640x360) native projector resolution is actually the worst resolution across all multimedia projectors of a comparable type and age to the PPX2330.
A DCI 4K (4096 x 2160) native projector resolution is the best resolution across similar types of data projector.
Alternative multimedia projectors that have a resolution of nHD (640x360) currently available which you might want to look at include the Philips PPX2340 ($199.99) which is cheaper.
If the resolution of this projector is too low for you then you might want to consider the Optoma S316 (SVGA (800x600 and higher rated) and higher rated), or the Acer P1173 ($514.82) (SVGA (800x600 and higher rated) and higher rated).