As off now the choices for a keyboardist that wants full accompaniment are auto accompaniment or backing tracks ( either audio or midi) There’s seems to be advances in how tracks can controlled in a live setting with looping sections and such. But you need a pre arranged track of some sort. A musician playing live will sometimes want to play something more spontaneous like maybe a special request or perhaps experimenting with an original song.

I think the instrument will continue to develop, maybe into something we can’t quite imagine now. As long as people play keyboards I see no reason why an auto accompaniment keyboard should die.