Simply, because it's a nexus. As an Android lover, there's nothing more exciting in the world of technology than a new nexus. And having used hardware by Huawei for sometime, it's guaranteed that the Nexus would make my life better and productive! I'm perfectly sure that the Nexus 6P will be a good replacement for my DSLR at times when carrying a DSLR is not practical, given that the 6P camera performs really really really well! And it's not only the best looking Nexus device ever or the best looking smartphone in the year, it IS the best looking portable device EVER made! It's a fashion statement and something that would show off class. I would be extremely proud to show off this gadget to anyone, because it simply is so damn beautiful ^_^ The Nexus 6P would almost make me dump my PC and my DSLR and would be much more than just a phone, a fashion accessory!
And that is why I want a Nexus 6P <3