The Google Nexus 5 has arrived with Android 4.4 KitKat onboard. The newest flagship smartphone from Google combines the best hardware with the latest version of Android to offer a fully refreshed experience for its users.
With Android KitKat you get the biggest visual overhaul since Android 4.0 Ice Cream Sandwich, with brighter colors replacing the old "Holo" blue. Google has also improved several of their android applications - text messages are now handled by Hangouts, the dialer has turned into a sort of digital yellow pages, and Google Now is now built into the stock launcher.
Google has also worked hard to give their users an amazing hardware experience with the LG built Nexus. You get optical image stabilization (OIS) with the Nexus 5 camera which should be a huge improvement over the Nexus 4 for low light photography and blur free photos. You also get a powerful Snapdragon 800 processor powering the device, which is a staple for flagship handsets these days.
All in all, the Nexus 5 will be one of the top smartphones of this year.
source - Android Central