The highest resolution of the EB-4950WU is WUXGA (1920x1200). That's over two times the resolution of a WXGA (1280x800) projector, which is the most common resolution.
This data projector's resolution (WUXGA (1920x1200)) is actually the best resolution across all 5000:1 contrast ratio projectors that have been on the market for a comparable time to the EB-4950WU.
An XGA (1024x768) native projector resolution is the worst resolution across similar types of data projector.
Other data projectors that have a resolution of WUXGA (1920x1200) currently available that you might also want to consider include cheaper projectors such as the Panasonic PT-VZ575 ($1,828.99).