You will get WP 8.1 update 1 as long as you're still enrolled in the DP program. That being said, Cyan is a firmware update, whereas WP 8.1 and update 1 are OS updates. So unless you install Cyan, you will stay on Black. That is until Microsoft has a fix for the issues in place and unblocks the full update for those of us who are still on the 8.1 DP.