I couldn't stop feeling like this page is nothing else but a promotion for "Model S" which is "superior and now" rather than the other car which is "inferior and 1 year later". Price would've been the biggest (and only) reason for "Model 3" but it's not shown on the page. Added extra details for "Model 3" is a nice trick to boost virality of the promotion aimed at its target audience -- potential Model 3 buyers. Well…
"Model 3 is designed and built as a mass market, affordable electric vehicle. Although it will be our newest vehicle, Model 3 is not “Version 3” or the most advanced Tesla. Like Model S, it is designed to be the safest car in its class."