I actually have something to add about the backgrounds. I found a neat little program that lets you create an image to use that appears to be three different backgrounds for your screens. If you go to this website and download the dual wallpaper app, it will let you use multiple backgrounds that match up to each screen size. It basically takes these images and makes a single image that will display across all your screens but shows up just like normal wallpapers. I used it, after hours of searching for something like this, when I hooked up my laptop to my TV with an HDMI cable.
There are some other interesting programs but I've only tried the one for wallpapers.