If you're wondering, this did not seem to be a model Y – the upcoming crossover has similar headlights to those of the Model 3, not to mention a remarkably raised rear end that was not present here.
It is possible that this is just a "botched packing job", as the eyewitness initially suspected. This does not correspond to the different rear lights, however, and the rumors of refreshing models S and X have been spinning for months. If it's actually an allusion to an upcoming update of the design, it will happen at a convenient time. Sales of S and X declined sharply due to the widespread availability of Model 3. More sophisticated designs could revitalize the interest of those who would otherwise purchase high-end versions of Model 3, not to mention giving Tesla best chance to withstand the competition of the likes of Audi and Mercedes.