Agree. Most of it is the cool factor. I honestly can't off the top of my head think of anything Siri does that I can't with default voice search beyond querying/adding calendar events. Asking questions gives me results with Google, and if really wanted to have those read back to me I could use Vlingo. I can't ask "where can I get a sandwich", but I can tell Google Voice Search "nearby restaurants" and it gives me a map with pushpins marking them. That's honestly better than Siri to me.