Samsung announced the Galaxy Note 4 at IFA, Berlin at the Samsung Unpacked 2014 event, but the announcement that got a lot of cheer was certainly the Gear VR headset. The Gear VR is a virtual reality headset which is powered by the Note 4 and Samsung has collaborated with Oculus to come out with it. The pricing details for the Gear VR headset were not announced.
Oculus, the maker of Oculus Rift, was recently acquired by Facebook. It has partnered with Samsung and other VR developers to come out with the Gear VR, which is completely untethered virtual reality headset. The Gear VR has a removable front cover into which slips in the Note 4 acting as the screen. There is a focus dial on top, a touchscreen controller on the right hand side. The Gear VR works only with the Samsung Galaxy Note 4 and it uses the Note 4 for its image processing and display features. There is also a provision to switch on the Note 4's rear camera to switch off from the 3D virtual world and see the real world as well.
The Gear VR has an accelerometer and a gyrometer for tracking the head movement. There is a 96-degree field of view and a 60 Hz refresh rate. Samsung and Oculus claim that there is no noticeable lag when you move your head and the visuals on screen.
As of now the availability date hasn't been announced and neither has the price. But Samsung maintains that it will launch the Gear VR this year. You will get 16GB microSD card pre-loaded with a variety of 360-degree videos and 3D movie trailers which will be on the Note 4.