The PPX4150 has a maximum resolution of nHD (640x360). That's 71% less resolution than the most frequently found native projector resolution of XGA (1024x768).
An nHD (640x360) native projector resolution is actually the worst resolution amongst all data projectors of this spec and age.
The best resolution across similar types of projector is DCI 4K (4096 x 2160).
If you want a projector with a higher resolution then you might want to look at the Aiptek MobileCinema i60 (£225.64) (VGA (640x480 and higher rated) and higher rated).