Yearly Renewal Help

My Norton 360 subscription expires this month. I've learned that N360 is being replaced by Norton Security, but I'm unsure as to how to proceed. While doing a search for N360 renewal, I came upon this: http://us.norton.com/360/ . If N360 is being replaced, why is it still offered? If the offer is valid, can I use it to get a new subscription? If the offer is not valid and I need to get Norton Security, is there a procedure for doing so? For example, after buying and downloading NS, will I have to uninstall N360  before installing NS or will NS do it for me? Will a future update eventually convert N360 to NS in the future if the aforementioned N360 offer is valid?  I apologize for all the questions.

Any help would be greatly appreciated.