Great news, and about time. I am not sure about a two year cycle though... that might be a bit too long for what I want as a user. But with such a big project, anything shorter might be difficult to accomplish, too. Anyway, it's a welcome direction: it's difficult to base things on a system that's not predictable.
Historically, they have released almost every two years anyway. Potato and Woody are the only exceptions (1 year and 3 years). So it makes sense to me to shift it.