They didn't even bring up that it isn't even full screen. Still, it is just a bonus feature and hopefully it is step 1 to Sony letting the PS3 play PSP games upscaled and in full screen.
I also noticed that they forgot to mention that playing with the DS3/Sixaxis also changes the game. Playing it on the PSP it has an auto aim system, but if you a controller it completely turns that off and makes it totally free aim.

I don't get why anyone would do whats going on in the bottom picture.
Reading more into this it seems like to get everything in Resistance PSP you need Resistance 2.