What is the media query for large desktops?

Just check what are the screen sizes you need to styled with difference styles. then use media queries as you need. ;)

@media screen and (min-width: 1400px) {}

@media screen and (min-width: 1600px) {}

@media screen and (min-width: 1900px) {}

The challenges of optimizing for large-scale displays center around how to scale and manage content. You need to assume screen width at certain points.

Example: for class "container"

@media screen and (min-width: 1400px) {
  .container {
    width: 1370px;
  }
}
@media screen and (min-width: 1600px) {
  .container {
    width: 1570px;
  }
}
@media screen and (min-width: 1900px) {
  .container {
    width: 1870px;
  }
}

Media Queries for Responsive Design

@media screen and (min-width: 600px) {
//For Tablets
    .container {
        width: 100;
    }
}

@media screen and (min-width: 768px) {
//For Laptops
    .container {
        width: 738px;
    }
}

@media screen and (min-width: 992px) {
//For Large Laptops
    .container {
        width: 962px;
    }
}

@media screen and (min-width: 1280px) {
//For Big TV's (HD Screens) 
    .container {
        width: 1250px;
    }
}


@media screen and (min-width: 1920px) {
//For Projectors or Higher Resolution Screens (Full HD)
    .container {
        width: 1890px;
    }
}
@media screen and (min-width: 3840px) {
//For 4K Displays (Ultra HD)
    .container {
        width: 3810px;
    }
}