Oh, if we're talking aspect ratios rather than physical pixels, then 1920x1080 is your standard HD resolution and 16:9 aspect ratio. My main HDTV is 1920x1080 and that is exactly where I display my images at home. Where possible I will actually crop my images to 16:9 so that they fill the display perfectly, corner to corner. Where framing does not permit that, or aesthetics will be spoiled, I leave uncropped or crop in what ever other way is advantageous.
As far as working on images, what with tool palettes and toolbars and status bars and task bars to be accommodated, I don't see that there is any particularly useful relationship between the shape of a picture and the shape of the workspace. That said, for something like Photoshop or Lightroom, the extra width is probably a bonus, as they rob space from the sides of the screen far more than the top and bottom.