It was only a matter of time once HTC announced that it had turned over the Android 4.4 KitKat code to Google to upgrade the HTC One Google Play Edition. Reports of owners receiving the promised update began to surface today on a number of websites including xda-developers.
The update weighs in at 305MB and is the KRT16S build of Android 4.4, the same as the Nexus 4 and Nexus 7 have received. As expected, it does not include the Google Experience Launcher that remains a Google Nexus 5 exclusive at this point. If you really want the features it brings (such as the Google Now homescreen), there are ways around that exclusivity by sideloading the .apk file or finding a launcher app that mimics it.
Unlike the HTC One offered by carriers, the HTC One Google Play Edition runs a stock version of Android without any HTC customization and added apps. As such, it does not come with HTC Sense, making it easier to upgrade than the standard version which will require that HTC’s software also be tested and upgraded to work properly with the new version.
Source : xda-developers