Since moving to Android I've been using QR codes a lot more. I noticed that several products I've bought recently have QR codes that encode a url. It's kind of neat. Well it just occurred to me that the ability to share a url with someone nearby you could be very useful. Turns out you can do this in Chrome. It's just another option in the share menu. You don't need an internet connection, you don't need to exchange contact details or login info, the url is encoded into the weird looking pixelated image. The person nearby that you are sharing the link with just has to scan the image with their phone's 'scan qr code' feature, which most modern phones have.
BTW, I'm seeing QR codes everywhere here in Europe. I think you can even pay bills using them, but I haven't figured out how people are doing that yet. Stablecoins perhaps? #