I mean, Elon made the same claims about Starship Earth to Earth, Mars colonization, plus other outrageous claims about the hyperloop and the boring company and Tesla autopilot (in 2014 he said that in 5 years you'll be able to go to sleep behind the wheel). At what point does the genious marketing end and defrauding investors with false promises begin?

When they intentionally deceive. When you promise something without intention of delivering.

In case of SpaceX and Tesla they claim outrageous things with every intention to deliver.

Sometimes they are right, sometimes not. It's up to investors to know the difference.

The TED interview gives out strong Elizabeth Holmes signals.

Right, except SpaceX has put humans in the ISS.