Personally, I fully expect this to gradually become the primary method by which all ID is issued and used. Cell phones are already effectively mandatory to function in our society, so whether you need to target a protest of potential dissidents or an audience of potential customers, it's the perfect one stop shop for our newly emerging highly integrated state+industry power structure.
I had to get my license renewed the other day and I watched an older person pull out a 2000s coolpix digital camera and bring up a picture of the barcode on the screen on the back to sign in.
