I'm pleased to see they're adding additional barcode types (including Codabar, which is used by many library systems, apparently), but they really need to add a system to support QR/bar codes that update based on time - lots of places, like Target and Costco, and some transit systems, use codes that update every minute or so, so that you can't just share a screenshot to other people. Which is fine, I guess, except it means you have to open that app every time,minstead of using Wallet.
So, add an API that app developers for the various store apps can use to register a callback - so you can have the pass in Apple Wallet, and when you bring up that card, Wallet asks the app "what's the right code for right now?". It preserves their security (no one can screenshot your card to use), but makes it just as frictionless as other cards in Wallet (just idly checked, and to get to my Target barcode in the Target app took 9 actions plus a bit of waiting, from a locked iPhone, while getting to my IKEA card in Apple Wallet took 3).