My worry being the screen vs battery power struggle which the battery will lose, quickly.
Yes I'm aware the N6 will sport default ART which is a first and I'm sure that will help the battery BUT the 3220MAh battery has that huge AMOLED QHD screen to throw pixels around.
Looking at the LG G3 which I guess is the closest we have in terms of screen and battery (along with many other specs), that managed to last a day of usage. Which we found to be reaching for the charger after a days abuse by 7pm...on gsmarena.com LG G3 it gets a 69h rating- you can compare the spec sheet here
One issue with the Moto X 2nd gen was its piss poor battery life which stopped me from buying it and I cant help but think Motorola have shot themselves in the foot again, faster CPU, more memory, bigger screen; are we set for another Nexus disappointment ? let the hate mail begin, but the N5 suffered from the same fate, terrible battery life in an otherwise excellent device.
Apple iPhone 6 also has an average battery life, and here is a golden chance to show how Android is the best platform for large screen handsets, setting itself apart from Apples flagship; with a pure Android experience too.
I want the N6 to succeed, I really do...Motorola just has a history of knocking itself out just as it reaches the 12th round.