Elon Musk shared a Grok-generated AI video showing him dancing with Tesla’s humanoid robot Optimus, delighting social media users. The fun clip sparked creative remixes online.

The two companies owned by the tech multibillionaire are reportedly merging ahead of an IPO. But what does it all mean? Two of Elon Musk’s best-known companies look likely to be headed for a megamerger ahead of a mooted IPO.