NBA scouts know he can score. What makes him unique is how he does it (as you can see from the Shot Analytics shot chart below):
In the shot chart, you can see the areas where he excels. He shot 49% on shots in the paint from outside of five-feet... the national average: 38.4%. Two examples of those shots are below (vs. Rodney Hood of Duke and Lamar Patterson of Pitt)...
Warren also was terrific at finishing at the rim. 41.4% of his field goal attempts in league games were within five feet of the hoop, and he made 69% of those shots. That's a higher percentage than Julius Randle, Noah Vonleh, and Adreian Payne, three true post players who are projected early first-round draft picks.
Here is a collection of highlights from Warren's sophomore season where he lit up the scoreboard for the Wolfpack.