i tested personally the prototype of smachZ and is fully working device, but without the final specs.
the device is running with the steam controller and is capable on running windows games on it.
here is a photo taked by myself, with my GPD-Win, current SmachZ prototype and printed 3D final prototype on the table
and i tested the final hardware running on a barebone, and the system feel so smooth and better running than GPD-Win, this is true, but the concept is different than the Win, because there is a gaming hardware on this device.
i did an interview
with few members of this project. if there is some interest, i can do a translation and post here, for your info.