Google launched a cloud-based version of their Google Wallet app, which permit users to use any credit or debit card by Visa, MasterCard, American Express, or Discover.
Google Wallet is very exclusive app that is available only on selected devices, like the Galaxy Nexus Smartphone and Nexus 7 tablet, the Galaxy S III etc., and only in selected countries. This new cloud-based app Google Wallet is very secure , because it moves users sensitive personal data from the secured storage area of users phone to a secure Google server with only the wallet ID remaining on the phones’ secure storage to make easy transactions at the point of sale. With the help of Google Wallet users can also lock and disable their account through online account page. This Google Wallet app is available only in the USA.
Source : Blog.gsmarena