Depending on your use case, what style you're looking for, and what device you're using, different options might work better than others for getting the best 4K wallpapers. For desktop computers ...

Abstract wallpapers look sharper and more vibrant on higher-resolution screens, making them an excellent choice for Mac users. Here are the twenty-five best abstract wallpapers for your Mac.

It entirely depends on the user what kind of wallpaper he/she finds best for his/her PC. While some users like to add animated backgrounds, other users find adding video as a desktop background cool.

Thankfully, making your desktop more ... a website for wallpapers, but if you're looking for some incredibly fan-drawn images ...