https://www.techradar.com/news/best-360-degree-camera

Are you in the real world yet? Forget the 3:2, 4:3 and 16:9 camera formats, and embrace the world as it is – a 360-degree landscape in which anything can happen, anywhere. That's the selling point for a new breed of 360-degree cameras that usually put two fisheye lenses back-to-back in a variety of designs to let you capture the world in a whole new way. 

However, do be careful about claims of high resolution; 4K may sound a lot for a standard video, but when those pixels are shared around a 360-degree landscape the end result won't look as detailed as you might expect.