How profitable is VR?

Could you elaborate on the profitability of virtual reality, specifically in terms of potential revenue streams, market growth, and potential challenges that businesses may face in this emerging sector? Additionally, are there any case studies or success stories that highlight the profitability of VR ventures, and what strategies have been employed to achieve success in this space? Furthermore, how does the profitability of VR compare to other industries, and what factors contribute to its unique position in the market?