Why can't WP8 open .xps files?

[msualum]

Isn't .xps Microsoft's format? Is there an app that can actually open this format or shouldn't it be native to WP8

 

[katsquared]

Well according to this guy on here Viewing .XPS files on a WP8 Phone - Microsoft Community : "Currently theres no app or XPS viewer for WP8."