I'll prophesize here:  In the future, most people will not use wallets on their computers (due to security risks).

Most bitcoins will thus be stored at bitcoin banks, and a purchase at a burger king will be between bank and burger king. Trust will be immediate and you'll get your burger right away.

Thankfully, people won't HAVE to use banks if they don't want to, and the banks can't peddle fiat BS.