The "Google Experience Launcher" found on the Android 4.4 KitKat is a Nexus 5 exclusive feature according to Google, and it may not become available to other Nexus devices or other Android handsets and tablets anytime soon.
In KitKat, the new launcher is part of the Google Search app, report says
Users can either enter “define:” followed by their word of choice, or use voice search. For some words, simply entering the word in the search or omnibox will bring up the definition and synonyms, but not all. Searching for “Android” yielded a host of results about our favorite operating system, while asking Google to define it brought up the definition ahead of search results.
Google Now gets new cards: car rentals, concert tickets and commute sharing
In Google Now, a card with the title “Listen for a TV show” will allow you to get info about what you’re watching in real time, without entering any data. Maybe that actor was on a really great show you used to love, but can’t quite remember the name.
Apple drops Google for Siri searches, switches to Bing
During the keynote presentation at its developers conference, Apple has revealed that Google is to be dropped as the Internet search engine for Siri in the next release iOS 7, Bing will now be used instead. Are Apple making a mistake by switching to Microsoft's Bing?
Nutrition information added to Google Search, helps you with your diet