I think the real allure of open offices is how they look. Open offices look modern. They look like the kind of working area a hip, young, collaborative, industry-disrupting company would favor. But that's all bullshit. It's just a fairy tale that fools outsiders. Open offices look great to someone coming in for an interview or an executive visiting from company headquarters 3 states away. But at this point I think we can be reasonably sure that that's where the benefits end.
I don't think this change will damage my productivity much. I'll have headphones on all day, instead of 10-20% of the day. Seems like a lot of trouble for that kind of outcome. I'll probably enjoy shopping for some new headphones though.