Man, if they can make a straightforward phone with a reasonably sized screen for people with normal hands (like my beloved Motorola Atrix HD from 2012!), and do it with only upstream kernels and free drivers and infrastructure, I'm in.
I love the idea of running Arch Linux on my phone, it would vastly simplify the harsh divide between my workstation and my smartphone. There's also a distinct possibility of running OpenBSD on my phone in the future, which is where I'm increasingly going.
The thing could probably run Android applications anyway, if it really needs to. There are projects out there that let you do this on desktop Linux today.