Wow dude. I'm cancelling my preorder. Thanks.
It's always wise to take the PR-nonsense with little scepticism. I kept telling people not to take "200 years" literally and guess what, I was right!
Well, we can kind of infer things about the story and characters from the date. I don't really have a problem with it and I'm actually a little surprised we didnt' get official word from Beth on the year but to some it definitely is a spoiler.
You can infer things from the setting as-well, wager by it's proximity to previous games what might be present etc. You can't literally reveal nothing about the game mate.
Besides the date is in the Pip-Boy companion app from Bethesda which I would think is tantamount to a statement by them on the date.