You don’t capitalize that ‘X’ by accident. Tesla’s Model X is a crossover/SUV built on the Model S frame with more headroom,
gull falcon wing doors in the rear and room for 7 or 8 adults.
Tesla pushed the rollout of the X back to focus on meeting Model S supply but the product is due next year and can be reserved for $5000-$40,000.
Update: We’ve heard that the invite to the store says: “Come by to experience Model S and to see the Model X Design Prototype on display all weekend.”
Update 2: Here’s a picture of the Model X care of Sahas Katta the guy who made the Tesla Glass App.