Direct3D will win out, almost certainly.
Glide is dead, stagnant and archaic, it is no longer a player.
OpenGL would be dead if not for JC. Without him, OpenGL probably never would have been used as a widespread gaming API and with DX8 set to trounce OpenGL in nearly every aspect as far as gaming is concerned, its' future looks quite dim. Without Doom3 and its' engine, I would say OpenGL is also dead but with JC/id's support it will remain as it is today, a small player with a few huge hits to keep it in people's minds.