I use this feature almost everyday using my Telegram/Whatsapp on my laptop Also with exchanges I'm always logged in on my mobile and its super easy and secure to login even on laptops/PCs you dont own. You dont need to type in any email or password just simply scan QR which makes super secure and phising proof. I see this as future of authentication, with KILT credentials added to Nova this would be a great addition to ecosystem projects I made a few sketches to showcase how I envision it. Feel free to use these to apply for grants