Correct me if I'm wrong, but I was under the assumption that Konami shuttered all their console games to focus on pachinko machines because the profit margins are just too delicious to pass up.
My take is that Konami seems to have lost a lot of their creative mojo during the industry's creative nadir in the early 00's, when sports and gritty FPS franchises reigned.
They don't need to, Pachinko (their newer machines use fox engine it seems) exists.