It is 16:9 but is designed for 1366x768 resolution (the native resolution for most 720p screens). 1080p is, if you're doing 1:1 pixel mapping, 1920x1080. In most cases it will be ok, but you'll get some font issues like overlapping text. You can either switch resolution on your PC (probably not some thing you'd want), find a skin that is designed for 1080p, or mod the files yourself to fix the overlapping text - it might seem daunting, but it's all just text files, so shouldn't be too hard.