So i think we really need to learn to split the significance of an announcement from the effect on TSLA.
I think then honeymoon phase is over and only hard results will matter. Until Tesla shows a good quarter (beats Street expectations) announcements like this won't matter. There may be a small "buy on the rumor" but it will be followed by a "sell on the news".
The only non earnings announcements that could break this trend are things with a significant, positive financial impact (big partnership, merger, Model X production start). Maybe Model 3 protoype shown ahead of 2016, or the unlikely event they now enable an extra 50 miles of range on all cars somehow would move the stock, but a navigation update won't.
Having said that, I am super excited about next Thursday, wondering what they cooked up this time, just don't expect this to set us on our course to $300 again.