In 2008, voters under 30 propelled Barack Obama to victory, choosing the Illinois senator over Hillary Clinton by a 43-point margin. In 2016, those younger voters single-handedly lifted America's favorite democratic socialist to a virtual tie: Sanders outperformed Clinton among voters 18 to 29 by 70 points, according to CNN's entrance poll.

Unfortunately, 'the future' might start AFTER 2016. Quoting Slate's  Jamelle Bouie:

Sanders is already a historic candidate--the first socialist in a century to build a genuine mass movement in American party politics. And whatever the Democratic Party is in the next 20 or 30 years, it will owe a great deal to Sanders and all the people--young or otherwise--who felt the Bern.