The details are still sketchy but the Dell headset was talked about here
http://techreport.com/news/32466/dell-visor-vr118-is-just-what-soldier-76-ordered#0 "The Visor VR118 is designed to keep the weight of the device off of the user's face and nose—a primary user complaint about the HTC Vive. The front portion of the headset can flip upward to let users look at the real world without needing to remove the entire Visor. The display and power cables run along the ring that encircles the user's head and waterfall down the user's back, much like with other VR headsets we've seen.
Dell didn't offer a ton of technical details about the Visor, but we do know that the display has a total resolution of 2880x1440 and a 90 Hz refresh rate."
From what I gather the setup is very easy and the image, while it still has the screen door effect, is sharper.
There has been claims of lower overhead due to the fact that the headsets run off of the OS and not some app like the Vive and Rift do.