It certainly looks like it, and they look … good? The main attraction is in the details, and we don’t really see any of those here, but it’s a good start.
UPDATE: The Sixers (and Noel) confirmed that they are indeed the new unis, but they don’t show everything. “As much as you can show,” Nerlens told Mike Sielski. “The stars on the side, you can’t fit it all in there.”