That sucks that your bank still doesn't support it. Mine wasn't at launch but was one of the first post-launch. Anyway, I think Target is part of that consortium of stupid companies that are backing that competing platform (ok, finally looked it up as I forgot about it, CurrentC). I haven't heard much from them since they got hacked last year. Target in particular, like you said, has much to benefit from using a secure platform like ApplePay.
I think eventually fast food places will integrate it into the ordering screen/speaker system. I see the future of fast food as thus: You order it and pay in the app, and when you get into the drive through lane it senses your device and puts in the order. They could even implement a "fast pass" lane for those people so that they get their food even faster, especially if they order it ahead of time. The logistics need to be worked out but it's just a rough idea.