The Gears of War influence is being worn on Ironfall's sleeves here, and while that could be disappointing, you could always view it as the 3DS' version of NOVA, itself a clone of another sci-fi shooter (Halo) which was still useful as an example of what a handheld gaming platform can do.
Below is the tech demo in full. You might want to go full-screen to see it properly.
Ironfall is coming to the Nintendo 3DS e-shop. The game's site is here.