One of the most persistent rumors leading up to the launch of the Galaxy S5 was the presence of a fingerprint reader for authentication. This rumor has proven to be true, and the fingerprint reader will be integrated into the Home button on the Galaxy S5, much like the implementation on Apple's iPhone 5S. The reader will be used for authentication for things like unlocking your phone, making mobile payments, and also a new private mode that lets users hide certain pictures and videos from everyone but the owner. They gave an example of having a photo of your passport handy, but we all know what people are really going to use this feature for.
Another big part of Samsung's announcement was their commitment to the S5 as a fitness device. The S5 has an integrated heart rate sensor in the back, by the rear camera. This will work in tandem with their new S health fitness management solution, which will offer real-time coaching. The device will also work in conjunction with the two other Samsung products we'll talk about next -- the Galaxy Gear 2 and the Galaxy Fit.