The sighting of Tesla's Cybertruck on Californian roads and Elon Musk's confirmation suggest that the product is moving closer to commercialization. This news is likely to have a positive impact on Tesla's stock price, as the anticipation of the Cybertruck launch has already driven the stock higher. The launch is expected to have a similar effect on the stock as the Model Y launch in 2020, which led to a 743% increase in Tesla's stock price.