Right, so now you need an additional device on hand (your phone) to parse the QR code into a string. Or I guess you could activate your hot laptop's webcam, pick up your cold laptop, crank the brightness up, point it towards your webcam, and capture the QR like that.
Sounds kinda clunky.
You need an additional device on hand to use the hardware wallet too, so that's not an argument against an air-gapped general purpose computer instead of a hardware wallet.