In fact there is a term for the resolution you're using, and that's WQHD (Wide Quad High Definition) at a res of 2560 x 1440 (or in your case 1090, depending on the aspect ratio). Ultra High Defnition would be 7680 x 4320 (or 4320p), basically four times the height and width of regular HD (and 16x the resolution).
http://en.wikipedia.org/wiki/Ultra_High_Definition_Television