I have such display. It is quite spacious once you remove all decorations [1], that is no window decorations (xmonad), hide URL bar and browser tabs [2], no page scrollbars [3]. I encourage everyone to try at least browser addons.

[1] http://sergeykish.com/side-by-side-no-decorations.png

[2] https://chrome.google.com/webstore/detail/convert-to-popup/i...

[3] https://github.com/sergeykish/hide-scrollbars # chromium, firefox has another rule:

    html {
      scrollbar-width: none
    }