I had a chance to try the Passport a bit as a friend has it and the keyboard is really really nice - it is actually also a touchscreen so you can use it for gestures and each key can has basically three state (no touched/not pressed, touched not pressed, pressed) and applications can make use of that. AFAIK the friend is happy with it and us using it as his main device. On the other hand I don't really like how closed and limited (very app-focused & embedded) the BB10 OS is (I participated in the BB10 developer programs an have a Z10 LE so I have some insights to how it works under the hood).

On the other hand a similar device or at least similar keyboard would be a killer combination with Sailfish OS.

Also the Passports are as far as I can tell selling like hotcakes, showing people do want keyboard mobile devices - it is just the manufacturers fault not selling them. Hopefully some of them will notice the success of the Passport (and TOHKBDv2) and reverse the unfortunate trend.