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.
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.
Yeah, I'm not deep into this stuff, but I thought the role of the device is to hold the key for a wallet that you don't intend to transfer out of very often. This makes the trade-off (more hassle, more security) worth it. If you are using the key all the time I don't see the point, the storage device won't be the weak point in your setup anyway.
Sounds kinda clunky.