It almost tempts me to want a PSP but some of the details like the honor/dishonor for killing "innocent" aliens turns me off. The fact it's a PSP exclusive for now doesn't mean much either. Only a matter of time and it'll be ported to the PS2 ala Liberty City and Vice City I bet. The graphics look fine for a portable but they don't jump out at me either.
If it wasn't for Rebellion being behind it, I wouldn't even feel all that tempted. It looks unimpressive at this stage but then it's photos of a magazine article so I'm holding off on my final opinion of it.