I uploaded a screenshot of my battery test to SkyDrive tonight from my phone. It was 1280x768, but that's different from the 1080p of the camera. I'll try it in a second and report back.
If you can see that, you'll see where the dimensions are at 3552 x 2000. The resolution is not mentioned, though. With such massive dimensions, even a 1080p (1080x1920?) image will look odd an pixelated. I cannot say what the resolution is as a result.