Screen shot 2014-02-24 at 5.41.11 PMAt Mobile World Congress today, Samsung announced the latest version of its flagship smartphone, the Galaxy S5. If it’s anything like the S4, lots of people will buy it. Since it has a larger number in the front, it will probably be better: bigger, faster, etc.  But more intriguingly, it’s going long on biometrics: not only does it feature a pulse-detector, there’s also a fingerprint scanner stuffed inside, a la the latest iPhone. Unlike Apple’s machine, though, Samsung has teamed up with PayPal to get you shopping through, literally, the press of a single button. Rather than logging in with a standard password on sites accepting PayPal, S5 users will soon be able to access their accounts through their fingers. More