1)First of all it's important to have Wi-Fi in a phone, i don't know what the reason may or may not be but there aren't phones out there that do but this phone does.
2)Well, the QWERTY keyboard is very important I have tried out on this phone at the AT&T store and all i have to say is that the keyboard's amazing and it feels comfortable when you text.
3)The phone needs to have windows mobile to be a successful smartphone and this phone has it.