It is ironic to see how we became so dependent on mobile technology, and specifically cell phones. Personally, I reached a point were I cannot leave my home without a cell phone, and if I did, I feel something missing. Honestly, if I have to choose between going out without a wallet or without a cell phone, then I will definitely choose to go out without a wallet.
Cell phones are not anymore just a communication device, most of them have audio, video and data storage, camera, Internet and search capability, games, converters, maps, etc. From a business and professional aspect, you use your cell phone to attend meetings, conferences, and schedule and manage your appointments, update your calendar, and monitor your business and market, etc. Moreover, others have even more advanced, convenient and helpful capabilities, such as virtual-wallet technology were you can use you cell phone to pay for goods in some stores and some vending machines in many countries around the word.
For instance, I used my cell phone at Starbucks to pay for my Latte, and hope to soon use my cell phone to pay when buying from vending machine, which already exist in many Asian countries, like Japan.
As of now, here in the US, many vending machines support wireless technology where you can use your credit card to pay for your vends (www.Healthy2Go.net), and hopefully soon we will be able use our cell phones to buy from vending machines, which I believe is very cool and convenient.