The fingerprint sensor on the back kind of intrigues me.
I've noticed if I grab my iPhone 6S+ my index finder naturally goes to the area on the back where Google has their sensors. Part of me wonders if it would actually be easier to manage than the iPhones where I find myself having to actually grab the phone and then move my thumb into position.
As far as their actual devices, I've been looking at getting an Android device for some time. I want to start doing Android development and a test device would be needed. As far as I am aware (and I could be wrong) the Nexus phones are basically the most up to date Android devices you can get in terms of OS updates. Something which I think would be important for testing.
I'm still not 100% decided though.
Nothing in the product announcements makes me want to go out right this second and preorder / buy one.