This is official from Google:
"No, Galaxy Nexus phones won’t be receiving the update for Android 4.4 (KitKat)." (Source
And with that ends any hope for Samsung Galaxy Nexus owners that they will ever receive an official version of Android KitKat. The reason is stated clearly: the phone is out of the 18 months update window that Google uses when releasing new updates (there's been more than 18 months since the release of the Galaxy Nexus).
Max Duckwitz still has hope
Despite the official announcement from Google, there is one Galaxy Nexus owner that still has hope. Therefore, Max Duckwitz started an online petition addressed towards Sundar Pichai, the head of Android, to release Android 4.4 for Galaxy Nexus, even though it's outside the 18 months window.
Since it was started, the petition managed to get more than 15,000 signatures and needs only a few thousand more. However, there are slim chances that this will make any difference. But who knows, maybe the fact that so many people supported this in such a short period of time will impress the guys at Google and they will make an exception for the GN.
Galaxy Nexus is 'outdated' for KitKat
Even if Google was to be impressed by this petition, there are still some other impediments that make it even harder for the GN to get Andorid 4.4. Apparently the OMAP chipset that powers the device is lacking updated binaries and hardware drivers. One reason for this is the fact that Texas Instruments, which is the chipset manufacturer, is no longer in business. This means there will be no updates. The only way would be for Google to unofficially update them, but that's hard to believe because they surely want old Galaxy Nexus owners to buy their new Nexus 5
This being said, you can still support the cause and sign the petition
. Maybe after all of this, Galaxy Nexus will get Android 4.4 KitKat :)