Paspberry Pi Zero PCB ver 1.3 also sounds promising for ultra-low power consumption of 100mA when idle
I have to say, I am annoyed at concept of memory shared between CPU and GPU; cannot each of them have their own RAM? But that's Raspberry's choice.
Then why did Jolla choose I2C, such a crippled solution?
It's ironic that Jolla got a variety of TOHs (infrared imaging and eInk display, besides keyboard and battery), while I haven't heard about such a variety of addons available for Moto Z.