The Dell Latitude 13 looks nice, with backlit keys on the keyboard- but it’s bluetooth and at 13″ is too big.
The design of keyboard docks like this one is a balancing act … literally. It’s important for them to be lightweight, but hefty enough to provide a stable platform to hold up the display. This model skirts the edges of almost being too light, but doesn’t go over the edge. Still, it’s a bit back heavy in laptop mode.
Of course the new Lenovo Helix 2 is what is really interesting (i.e. tempting) to me.