For those of you out of the PSP loop, their recently upgraded processor now runs at 333 MHz, an upgrade from the previous 266. There has yet to be a game that has maximized its full potential, but that will all change once Siphon Filter: Dark Mirror drops on us this fall.  Chris Reese, of Playstationblog has recently released this statement.

For Syphon Filter: Dark Mirror, our concentration was developing an engine that could produce stunning PSP visuals, allowing for significant detail in the environments. For Logan’s Shadow, we naturally wanted to push the detail even further with our focus turning towards interactivity within those environments.

Now we have the ability to introduce Havok physics, water rendering/gameplay (as seen in the screenshot above), larger environments with significantly more interactive elements, and faster AI response times. In short, tapping into the full processor speed of PSP offers increased gameplay opportunities, while still providing the high production qualities you would expect after playing Dark Mirror.

They promise a huge difference in the overall game quality. Only time will tell.