Thefe were rumours of a new Surface Book releasing in April, maybe with new (or updated) Surface Pros... these were supposed to come with the new windows update.
Yday MS announced that they will be releasing the (old) Surface Book and Surface Studio in more countries. That is it.
The dream is dead.
That's not a delay. That's Microsoft never acknowledging the existence of anything, never announcing the release dates for anything, the rumor mill taking non-credible rumors and running with them, only to be proven wrong when those non-credible rumors don't come true.
Then those press outlets foolish enough to believe non-credible rumors claim that something was "delayed" in order to absolve themselves of blame of running bad stories in the first place.
But we did went for a full year without a refresh on their devices, so something was delayed, even if we don't know it.
No, that's not how it works.
It's not like manufacturers have a magical device magically available once every 12 months regardless of how or why the product should exist, and that "something was delayed" if nothing new comes out within that arbitrary 12-month window.
Sometimes things are deliberately planned from the very beginning for a specific schedule to come out at a specific time.
But you still can't delay a product that was never acknowledged (let alone announced) to exist in the first place.
But what does CU adds to these devices? It was supposed to be a big event for them indeed, but every thing is now expected to hit alongside Redstone 3 (cshell for instance).
Edit: That has been quite the trend with win10 actually. Every update was supposed to bring new features that bring these devices together and when they start working on it they get stuck on "onecore refactoring" and end up cutting everything to the next. The creators update was already delayed to this year due that, and ended up being a way lesser update than expected, and now Rs3 is supposed to be this giant update that will fix everything but we know better now on how this usually goes.
Where are you getting this information?
As someone who has actually worked on Windows for nearly a decade, the notion that the Creators Update was ever planned for 2016 would be pretty hilarious if it weren't so utterly impossible. RS1 and RS2 were both huge, have a ton of features, and I don't think anyone ever expected internally (and certainly never publicly announced) that they would both come out in 2016.