Cloudhead have been developing the Gallery 6 Elements for a number of years now and I had the opportunity to play an early demo version on the Oculus Rift DK1 back in 2013. Even then it was one of the better VR experiences available at the time and it's come a long way with its development since those early days.
First announced at the Mobile World Congress in Barcelona in March and recently shown at GDC 2015 the VIVE is looking to be the first decent consumer grade VR device to offer something a little different.
Unlike other upcoming VR headsets such as the Oculus Rift, Project Morpheus and GEAR VR the VIVE which is being developed by Valve in partnership with HTC uses 2 1200x1080 90Hz displays in a portrait (vertical) orientation rather than 1 screen in landscape (horizontal) . The benefit of this design is a boost in vertical field of view while the horizontal FOV is still on par with Oculus Cresent Bay prototype at 110 degrees.