Because gosh darn it I'd love me some capacitive buttons on my Nexus 5! I run a lower DPI (420) and I still feel like I'm giving up too much of my screen real estate to those pesky software buttons! I've tried pie and it's ok except in like Facebook and stuff when you want to go between your timeline, comments, pictures etc and you need to use the back button a lot, then it sucks. Hard. At the moment the best I can do seems to be to just switch between extended and normal desktop mode depending on which app I'm using but for reals if I could have some capacitive buttons good golly I'd be happy! I reckon with a 5.5" display I'd be pretty ok with software buttons only but with the 4.95" we're playing with I'd love a set up like the one plus one.