If you're a developer with an app, I guess you would want to see if 8.2 makes any changes to APIs you're using and if you need to do any work to prepare an 8.2 compatible release of your app. Once the work for that is done, then do the same for 8.3, which will come out after 8.2...???
There are apple developer forums where you can ask these questions, we're mostly just lay people here...