Its really ironic that Apple is going to introduce plastic phones and Samsung will do reveres seems like circle of life.
Apart from having a 16 MP camera it will also have optical image stabilization feature. Image stabilization is a feature which Nokia boosts upon a lot in its premium Windows Phone Nokia Lumia 1020.
Samsung Galaxy phones are so popular that it attracted 10 million buyers in just 1 month of its launch. This is phenomenal growth and that too with its cheap plastic body. If Samsung launches a aluminum body phone it will start giving nightmares to Apple and HTC who already have such phones in the market.
Many iPhone buyers ignore the Galaxy phones because of their plastic bodies which do not look premium at all and now they will have 1 more reason less not to buy these cool phones.