Qr code features similar to wechat

Examples:
1. Being able to add a contact via scanning their QR code on their device (snapchat, instagram seem to do this)
2. Being able to join rooms by scanning a QR code. This wouldn't be too useful in western countries afaik, Yet. But eventually, this could be used in like restaurants, businesses, women's shelters, college clubs to get people to join their rooms
3. Super down the road, it enables possibilities like using QR codes to pay and buy via element. (You can pay for products in vending machines by scanning corresponding QR codes via wechat)
4. In general, having a QR scanner built in or optional as a widget in the element camera function opens up future possibilities. Some phones are adding this to their default camera functions.

Wechat and these qr features are mostly used in china