The problem is that vendors of hardware (read: nVidia) do not want the OS to have full control over the hardware. So instead they write a driver that the OS can talk to, and everything else is kept behind closed doors.
Meanwhile, companies like Apple who integrate everything can have full control, and are likely to come up with the better OSes in the future, but they are even more closed and the only talks we'll see about them are keynote speeches by the CEO.
Meanwhile, companies like Apple who integrate everything can have full control, and are likely to come up with the better OSes in the future, but they are even more closed and the only talks we'll see about them are keynote speeches by the CEO.