You can move while you shoot! An employee of the site Destructoid movie has a playable demo of Resident Evil: The Mercenaries 3D for Nintendo 3DS during PAX East. The video revealed the unprecedented opportunity to move and shoot simultaneously, which was lacking in Resident Evil 5, although this feature was limited to avoid altering the gameplay too.
You can move, then, but very slowly and without being able to move while in the viewfinder. From what you can see (the author of the video did not clearly understand the concept of focus, unfortunately), the graphics in the game does not seem very different from that seen on the Xbox 360 and PlayStation 3, especially not by just having doubts that accompanied the launch of 3DS, especially in terms of technical capacity.
You can move, then, but very slowly and without being able to move while in the viewfinder. From what you can see (the author of the video did not clearly understand the concept of focus, unfortunately), the graphics in the game does not seem very different from that seen on the Xbox 360 and PlayStation 3, especially not by just having doubts that accompanied the launch of 3DS, especially in terms of technical capacity.