Need inspiration? You can check out some previous projects and quickstart guides:

• AR:
• (Web) WebAR Streaming App 
• (Android) AR Assistance App
• (iOS) AR Assistance App
• ML/AI:
• License Plate Recognition
• Gesture Recognition
• (iOS) Image Detection App
• VR/Unity/Unreal Engine:
• (Unity/Windows) Video Chat in Unity Projects
• (Unity/Mac) Video Chat in Unity Projects
• (Unity) VR Video Stream
• (Unreal Engine) Video chat in game

Future trends of Real-Time Engagement: 

• Virtual retail experience: live-streaming + traditional e-commerce model. (https://www.forbes.com/sites/tomokoyokoi/2020/04/23/could-livestream-shopping-provide-next-generation-entertainment-for-those-stuck-at-home/#50e022ba5229) 
• Interactive gaming experience: VR, AR, spatial audio 
  • FPS game like Fortnite (spatial audio) 
  • VR Conference: https://www.youtube.com/watch?v=LRMCA3mTPxE 
• Second-screen experience: https://www.digitaltrends.com/home-theater/second-screen-explained/  
• Virtual office/education: https://www.agora.io/en/education/ 
• Virtual concert: https://www.wired.com/brandlab/2017/07/live-concerts-take-virtual-virtual-reality/