Keith Harrison guides us through migrating from UISearchDisplayController to the new UISearchController that was introduced in iOS 8. Despite UISearchController not being available yet in Interface Builder the code looks simple to setup. I've struggled getting UISearchDisplayController to work consistently in a couple of apps and this does look like a big improvement.
Is it just me or have we heard very little about HomeKit since WWDC last year? David McGraw has an excellent overview of what to expect when developing an app that interfaces to a HomeKit enabled device. Looks like HomeKit removes the burden of device discovery and creating your own protocols.