Tesla says that it's holding a press conference tomorrow including CEO Elon Musk (then again, what Tesla press conference doesn't include Elon Musk?) that kicks off at 11AM PT, 2PM ET. There's no indication of what the press conference might entail, but there are some obvious possibilities: the first Model X deliveries are expected to start within the next few months, which means the company might finally unveil the production vehicle. It's also within the realm of reason that we'll get more details on the Model 3, Tesla's hyped (and critically important) play at the mass market. There's also the Powerwall, which was recently announced — maybe we'll get some more details on partners or deliveries.
We'll find out tomorrow. Stay tuned to The Verge for all the news as it happens.