Starting May 1, Apple will reject any application that access's the devices UDID. Also, any app submitted for approval that is not updated for the iPhone's retina display or isn't iPhone 5 optimized will also be rejected
In 2011, Apple outspent Samsung more than three to one on advertising its mobile phones in the U.S. In 2012, Samsung launched a massive marketing campaign that resulted in its outspending Apple on ads for the year.
Apple recently turned on HTTPS for the App Store preventing a slew of possible attacks including password stealing, app swapping, fake app upgrades, app installation prevention, and privacy leaks.