You can now buy iPhones and other products from Apple's Online Store using PayPal (US and UK only)
Of course, Apple was already accepting PayPal payments in its App Store, iTunes Music Store, and iBookstore, but this is the first time when the company starts using PayPal for purchases made via its main Online Store, thus allowing customers to rely on another payment method than credit or debit cards. Shoppers can even benefit from PayPal’s Credit payment method - paying for products in up to 18 monthly installments with no interest.
Apple.com is currently the second largest online retailer in the US (after Amazon), which means PayPal will have to deal with a lot of new transactions from now on.
source: Apple (US, UK) via Re/code. Apple Insider
Things that are NOT allowed: