The apps in the Mac App Store are set to receive some solid enhancements including push notifications, sandboxing and delta updates.
For enhanced security, apps will have a built-in sandbox mode whilst developers will have the ability to send “delta updates”, which are effectively ‘patch based’ updates, meaning the entire app will not have to re-downloaded with every update.Apps will also be able to send push notifications to users and just like iOS apps, can also have in-app purchases.
Phil Schiller also touted that the Mac App Store has become the number one retailer for PC software, overtaking even Best Buy.