When Google first announced Android 4.3 Jelly Bean and its short list of user-facing features, one item on the list was dial-pad autocomplete. You know, the feature that's been present for a long time in skinned versions of Android where when you begin dialing a number, the device uses your address book to guess who you are going to call and offers to complete the number for you. Yeah, that feature.
It's baked into Android 4.3, and if you happen to be using a Nexus device with the latest iteration of Jelly Bean, you may be surprised to not see autocomplete show up the first time you dial a number after updating. That's because the feature isn't enabled by default.
In order to use dial-pad autocomplete you'll need to launch the Phone app, tap the icon for the menu, and select Settings. A few items down you'll see an option for dial-pad autocomplete; check the box next to it and back out to the Phone app.
This time when you begin dialing a number, or even using the dial pad to spell a name, you'll see three possible matches right above the pad. Tapping on the name will start the call right away, no further action needed on your part.
Pretty neat, eh?