The Galaxy Nexus won’t be getting Android 4.4, at least officially, but if you dabble in the ROM game, you can get your taste of KitKat. The good news is that there are offerings for both the GSM Galaxy Nexus (maguro) as well as the Verizon Galaxy Nexus (toro). All of these are Alpha builds so expect bugs and glitches.
For the GSM (maguro), there is “A Taste of KitKat” from XDA member Grarak. WiFi isn’t working and there are some graphical glitches when taking screenshots, accessing the recent apps menu, and when the screen is rotating. There is also “SlimKat” from XDA member kufikugel. This one also has some graphical glitches, but WiFi is working.