I see no real benefit in this concept.
To big for a phone to small for a laptop.
And what the heck shall i do with a phone which is hidden in a mini Laptop.

Don't get me wrong. I still love my n900. But that's a totally different device.

The form factor of a n950 with that flipable sliding screen of the graalphone, up to date hardware specs, running in dualboot Sailfish and a proper Linux, that would be my dream device.