Nexus 7 and Nexus 10 owners can breathe a sigh of relief now! Since its announcement and official release it has been quite some time before Android 4.4 is available on the Wi-Fi only versions of the Nexus 10 and the Nexus 7 (2012) and the Nexus 7 (2013). And it is believed that Google will be rolling out Android 4.4 KitKat to these products tonight.
At present there is no information on how long it will take for the update to be rolled out, but it can be estimated that this is slated to arrive sooner than later onto these devices. So get on your devices and start refreshing the Software Update screen on your Nexus tablets!