Hmmm. That's also an interesting solution to the same problem. Although honestly, the scenario where I want to have a removable keyboard, I'm likely using an external display (probably a hotel TV), and a small wireless mouse is a lot easier to transport than a keyboard (and more ergonomic than a keyboard small enough for transport) so the extra screen and trackpad are sort of lost on me.
It also has two screens and its own stand, I use it as my travel machine.