Google launched a new version of android says 'kitkat' on google nexus devices, but the lg nexus 5 pure google experience launcher has different than nexus 4 specially the transparent three buttons and the notification bar. So we can tell you how to get the same look or theme on nexus 4 like you has seen the screenshot below of nexus 4.

Remember : You have 4.4 android version on your Nexus 4, if you are using a 4.3 version then kindly upgrade your device. (Go to Settings > About phone > System updates > check now)
After you upgrade your nexus 4 Go to this Nova launcher beta website and download the
Latest Beta APK and install on your nexus 4 device
Latest Beta APK and install on your nexus 4 device
Make sure you select (Unknown sources) option in your Phone Settings > security
So enjoy the nexus 5 experience on your phone there is no kind of any problem I face its more speedy than 4.3 jelly bean and way better your home screen because of transparent buttons or large display screen. If you have any trouble to install nova beta app please give a reply in our comments and keep sharing.
Home Screen

Apps and widgets Drawer

New Dailer on android 4.4

Caller ID by Google
