You might have heard of quantum dots in the context of TVs, but Samsung uses them in a 4K computer monitor as well, and their 28" model just got a massive price drop.
You can read all about quantum dots here, but the long and short of it that they’re the backbone of a backlighting technology that can produce OLED-quality images and rich, deep blacks on a less expensive LCD panel.
$330 is really not all that expensive for a 28" 4K monitor from a name brand manufacturer, so you’re definitely getting your money’s worth considering this model uses state of the art technology.