Instead of having mobile payments software on my smartphone, with all that security and confidentiality risk, I'd like a dedicated device. Perhaps a small, flat

Instead of having mobile payments software on my smartphone, with all that security and confidentiality risk, I'd like a dedicated device. Perhaps a small, flat plastic device with a processor and memory embedded in it; I could stick a bunch of them in my wallet. I don't understand the appeal of mobile payments at a physical location. It's not harder to pull out my wallet than my phone. Is there some benefit I'm overlooking?