Reading through these scenarios [0], QR codes seem really versatile. What use cases make sense? How have you bent these little squares to your will?
0: https://news.ycombinator.com/item?id=21417026
👤 byoung2 Accepted Answer ✓
I have little 4"x6" signs around my house with guest WiFi info (NFC too). We have a lot of parties and it saves a lot of keystrokes and chances for error.