Camera app needs built-in QR code scanning

Okay, so you want to scan a barcode of some sort. You swipe up from your lock screen, access GNow, ask it to scan a barcode et voila.

Can't we just swipe left (or right, depending on whether you're talking about the movement you make or the animation, but whatever) to the camera and have it automatically detect the barcode?

In the time it takes you to scan a barcode in the current implementation, you could probably type in the URL if you were quick. Surely this defeats the entire point?