Everything would look taller and skinnier. There may be some trickery out there that would push the 2560x1080 image to the TV once it was rescaled, but it will be distorted. I just don't think driver programmers have thought of having a second rasterizer that crops the output of another. Getting a different resolution image on each doesn't seem like it's going to work out. I love having dual monitors so overall this is a great solution, but it is distracting to have the different resolutions between the 2 monitors. Unless you can make the video card push the same image to both on its own. It would then forward the same 1080p signal to both displays. The most likely way would be to pick up an HDMI splitter and push 1080p out to it. The only way to make the image display appropriately on both is if the engine can be configured to render each frame twice at different resolutions and aspect ratios, but this will effectively halve your frame rate. The two displays you're trying to push to aren't even the same aspect ratio, so something is either going to have to crop it on the fly or distort it. Then you're going to have to compromise somewhere.
