Do not say this is impossible but This could be cool!

There would be this website with its own bitcoin card that you could load with your bitcoins! This card will be loaded once the confirmations were confirmed and then you can spend your bitcoins anywhere without your phone! They wouldn't need confirmations but it could take up to 2 minutes so the machine sees what your balance is and then deducts what you bought (plus the 2 transaction fees (#2 being the card company he's some extra money from that purchase)) from your balance and then you walk away with your item!

Yes more stuff would be needed but it's a great idea!