The keyboard may be coming back with future Blackberry devices but it won’t be in the (sweet spot) devices similar to Blackberry Passport, Classic or Q10.

Google just doesn’t allow in the Android Compatibility Definition any display wider than 16:9 or anything squarish than 4:3 (so even 1280×1024 is not allowed).

The screen aspect ratio MUST be a value from 1.3333 (4:3) to 1.86 (roughly 16:9), but Android Watch devices MAY have an aspect ratio of 1.0 (1:1) because such a device implementation will use a UI_MODE_TYPE_WATCH as the android.content.res.Configuration.uiMode.

So any future Blackberry device will have slide out keyboard or landscape display.