I believe The Sims 5 (maybe named as "The Sims") will be multiplatform, allowing you to play in a PC, Mobile Device or Console.
Mobile:
- Create your Sim for free;
- Fulfill your Sim needs by playing minigames;
- Build and download houses for your Sims.
PC/Console:
- Play the game in the way you want!
- Play with your Sims created in your mobile device;
- Import the houses you built in your mobile device.
By releasing a free companion app for The Sims, this would boost the PC/Console sales, just by showing to the casual people in mobile devices that they can play with their creations in a PC or Console. Also the Mobile companion app could advertise all new content released to the PC/Console version, also allowing people to buy new EPs/GPs/SPs only to free up new outfits for their Sims in the Mobile part.
VR/AR/MR? I don't see this happening anytime soon.