Nebulas in 4K brings ten such high-quality images that can be auto-rotated using the theme function in Windows 10. You may like This $395 MS Paint Mirror lets you live inside Windows 95 nostalgia ...

Each of these 4K wallpapers (that's 3840x2160, pixel fans) has been set to a desktop-friendly 16:9 aspect ratio, and with minimal compression so they look super sharp on your monitor.