Microsoft released their final candidate aka. Build 15063 for the Windows 10 Creators Update Version 1703 a few days ago. Since they are rolling it out in waves not everyone will be getting it right from the start.
If the Creators Update does not show up in your Windows Update window you can also download Microsofts Upgrade Assistant and start the update manually.
Or if you don’t have Windows 10 installed yet or need upgrade the files offline you can also download the current Media Creation Tool which then dowloads the current Windows 10 ISO for you.