"The Windows 10 April Update has begun seeping out from beneath the Redmond bathroom door"
Yes, and it looks like a lot of people are already getting it even though they don't want it yet.
https://www.askwoody.com/forums/topic/many-reports-of-win10-1709-users-getting-pushed-onto-1803/
I've already got the popcorn out... I'm sure we'll be seeing another "Oops, sorry, we made another mistake" announcement from MS shortly (gets a bit boring after a few years of hearing the same thing over and over).