Google has brought several real-time messaging services through Google+ Hangouts. Now a screenshot leak has indicated that Google will give Hangouts the ability to send and receive SMS.
Hangouts would also be able to automatically retrieve MMS messages. The screenshot also shows options to request a delivery report for each SMS message that is sent within Hangouts and retrieve MMS/SMS messages while roaming.
Today Google+ Hangouts is used for one-on-one and group video chatting. It also supports standard instant messaging.
[Source: Android Police]