Today via the Conversations blog, Nokia/Microsoft announced availability of the 8.1 update for Windows Phone, which includes the last piece of the puzzle, the Lumia Cyan firmware update.
Nowadays you need a
Ready for some great news? Starting today, the Lumia Windows Phone 8 smartphone family will receive the Lumia Cyan software, the new Windows Phone 8.1 update and Lumia features upgrade that will make your Lumia an even more personal, fun and indispensable part of your life
In reality the best place to get an idea of what is going on with the update for your Nokia device is your specific section of the Nokia Global Updates Page.