Elon Musk wants to merge SpaceX and Tesla, a move about control that matters for Tesla shareholders and the future of its AI and robotics.

• Musk owns 82% of the voting shares at SpaceX, so he fully controls it.
• At Tesla he owns only about 15% of the voting power, so he does not control it.
• He wants control over Tesla's Optimus robots and AI, which he currently lacks.
• A merger where SpaceX controls Tesla would hand him control of both through his SpaceX stake.

Outlook: Watch for a merger push that could reshape who controls Tesla's AI and robot future, though Tesla shareholders may resist losing independence.