We're all just speculating here, but I would expect any Autopilot upgrades to be minor. The reason being, the current system already uses MobileEye's EyeQ3 and the next-generation EyeQ4 won't be available for use in cars until 2018. The engineering samples aren't even ready yet. So, unless Tesla has ditched MobileEye, that's when we're going to see the next major leap. Of course, that doesn't rule out an additional camera or incremental improvements like a filter to cut down on glare that has been causing issues with lane keeping. But I'd expect those to appear on the P90D. I can't imagine the Model X having a more advanced Autopilot than the newest Model S. (If so, maybe the P90D already has some unannounced improvements coming off the line?) Now, where I can see improvements are features that are dedicated to the Model X and its purpose. Like 360 cameras common with SUVs, or other unique improvements for a utility vehicle verses a sedan. Maybe something cool like an LCD dimming top windshield? Or more advanced air suspension? Personally, I'd love to see a faster processor for the 17" screen. I don't doubt some incremental surprises... and I'd love to be wrong and see a major new feature reveal because it mean we'll all be getting better cars in the future.