gimmick
noun [ C ] UK /ˈɡɪm.ɪk/ US /ˈɡɪm.ɪk/ mainly disapproving
- something that is not serious or of real value that is used to attract people's attention or interest temporarily, especially to make them buy something
- something invented esp. for the purpose of attracting attention and that has no other purpose or value
https://dictionary.cambridge.org/dictionary/english/gimmick
VR is not a gimmick. I'd say if you call VR a gimmick, and are serious about calling it that, you are either being ignorant and/or most likely trolling.