Really? I've been looking forward to a release of iOS 8.4 on the same day as the WWDC keynote.. But apparently we have to wait for it until the last week of June unfortunately.
Apple had originally planned to release iOS 8.4 following the WWDC Keynote on June 8th, but we’ve heard that it’s currently planning to release it during the last week of June. As we also first reported, the new services will be available as a new app on Android for non-iPhones. The new services will likely also be available on the new Apple TV. Apple is not yet readying a version of the new services for other platforms, like Windows Phone, due to their low marketshare.