It's been this way for a while - a few months, anyway. I don't think many people want to go all the way out to a year, but it's perfect for people like me who publish every 3 months. It means I don't have to juggle dates. I can guarantee to put the pre-order for the next book up a few days before each release, so there's always a next book for readers to pre-order.
The other improvement in this change is that you have the right to push out a book's pre-order date by up to a month if you hit a crisis, and you can do it right there on the dashboard, no emailing and pleading. You can only do that one time otherwise it's into the pre-order sin bin with a year's ban, but it's a huge concession.