Read again: Question was "Will it work out of the box?" Now read again dirkvl's answer. Easier translation: It will work out of the box.
Dirk, can you confirm: 1.) in current OS version (Uitukka), the vkb can never be completely hidden? Otherwise, why don't you do that? 2.) 3rd party/community can't make the vkb go away completely, only Jolla can? Just saw that that known issue is in Tahkalampi! May already gone in Uitukka? Anyone using it already? Haven't seen it in the changelog...