That's a pretty bold claim given that Tesla has largely relied on hardware upgrades to extend the mileage of its vehicles, and it's not clear just what software tricks might be involved. This could mark the official rollout of the "torque sleep" update, which lets dual-motor models (the 85D and P85D) save energy when you're not mashing the throttle. However, Musk said that all Model S cars will get the update -- if so, that points to battery optimizations, a power-saving mode or smarter navigation. Whatever provides the boost, you won't have to wait long to get the full scoop.

Tesla press conf at 9am on Thurs. About to end range anxiety ... via OTA software update. Affects entire Model S fleet. - Elon Musk (@elonmusk) March 15, 2015