1. The hardware still needs improvement. Field of vision is too narrow (96 degrees) for fully immersive experience, pixels are too visible especially while watching video.
2. Despite #1, it’s impressive. For best effect, start with Cirque du Soleil  video and followup with Anshar Wars game.
3. Samsung is making a mistake by making it’s headsets not compatible with all devices that have similar hardware specs – the headset for Note 4 does not work with  Galaxy S6 and vice versa.
4. Capturing videos/photos in 360 will be a HUGE business once VR headsets go mainstream – I would gladly pay for a drone that would auto-follow me during outdoor activities. Also,  the same immersive experience will probably get used by movies, especially those that are CGI.
5. Can’t wait to see what how well Valve will be able to compete along Oculus and Samsung.