I don't know why, but this is somehow interesting to me... an iPhone w/ a dedicated HA controller on the back by running DomoPad in launcher mode? Would have to have a pattern or PIN login, though, I guess as I don't see mention of a biometric input.
https://www.indiegogo.com/projects/eye-smartcase-case-that-runs-android-iphone?utm_source=feedly.com&utm_medium=kickbooster&utm_content=link&utm_campaign=c050aa#/