Like she said, they could potentially seal an enemy in an instant. Darui used them to seal the Kinkaku brothers earlier, who have Kurama's chakra. So if used by someone who knows how they work (like Tenten said, she needs someone from Kumo to tell her how to use them), they could seal a powerful enemy... like say, Madara?
But I think it's all for hype at this point. I seriously doubt Madara would fall to get caught it something like that at this point...