Elon Musk unveils Model 3. Image source: Tesla Motors.

When electric-car maker Tesla Motors (TSLA -0.26%) took the wraps off of its $35,000 Model 3 earlier this year, CEO Elon Musk said the unveiling event was just part one. The part two news related to Model 3 was Tesla's Wednesday announcement that the vehicle would be equipped with the sensors for autonomous driving. But what's after part two? A part three, of course.

Does it matter?

It's not necessarily a surprise that Tesla is planning a part three unveiling. There are still many unknowns about the vehicle, such as the finalized design, battery capacity, EPA-rated driving range on a single charge, available battery upgrades, and the pricing of upgradeable options.

But as Tesla's late 2017 time frame for the first Model 3 deliveries approaches, it's becoming clear the company intends to generate as much Model 3 buzz as possible by announcing certain features leading up to the vehicle's launch. While Tesla's tactic for announcing Model 3 features in multiple events as production draws near could boost hype ahead of the vehicle's launch, and possibly even lead to more reservations, it will be the finished vehicle, and Tesla's ability to deliver it in volume, that will drive the company's growth.

Of course, investors will want to keep an eye on part three of Tesla's Model 3 unveiling given the importance of the vehicle to the company's business.