PC world offers an informative timeline for the Windows 10 Creators Update version 1703 rollout.  Using the WIN10 Update Assistant, users can manually request an early update starting on April 5 2017

http://www.pcworld.com/article/3186805/windows/windows-10-creators-update-rolls-ahead-with-early-access-and-date-for-phones.html

Adding this new information, the Windows 10 rollout schedule currently looks like this:

*** March 29: Microsoft confirms the current Insider build qualifies as the Windows 10 Creators Update; Windows 10 CU rollout begins to the Xbox One and Xbox One S.

*** April 5: Windows 10 users running a stable build of the OS can download a (presumably) stable build of the Windows 10 Creators Update via Update Assistant.

*** April 11: Microsoft begins pushing the Windows 10 Creators Update to PCs, in a phased rollout that could take months.

*** April 25: Microsoft begins sending the Creators Update to Windows phones