Aaron at this point a 5K monitor is more for the pro's to create 4K film and UHDTV media/video content. Â Remember its a PC monitor not a TV and 5K is a PC display resolution not a media / video / broadcast standard. 5K allows for a full 4K or UHD image (frame) to be displayed natively within the full res of the screen which is beneficial for video editing, animation, sfx etc.
Also, don't expect to see native 5K media content. 8K is the "next step" in broadcast standard after UHDTV.