Here's my list of new things that I would like to see at WWDC 2016:
Software
- Siri 3rd party integration
- Remote view controllers
- Split view with multiple views of the same app (e.g. 2 Safari instances) in iOS
Hardware
- Separate Apple 4K/5K Display
- Re-assign what the buttons on the Apple Watch do
- HomeKit device similar to Amazon Echo / Google Home
Services
- Street view for Maps
- A way to download or at least queue apps for download from the web. If someone runs across a news article for an app, s/he can click on a link to download the app to their device. Google's Play Store has had this feature for years. For Apple TV in particular.
- Upgrade pricing for major product updates for apps