If Hinata were as tall as Ushijima in the series, it would significantly impact his playing style and position on the team. With increased height, Hinata would have a greater reach and jumping ability, allowing him to block and spike more effectively at the net. This could potentially make him a dominant middle blocker or opposite hitter, adding a new dynamic to Karasuno's gameplay strategy. Additionally, his interactions with other characters, particularly his rivalry with Kageyama, may evolve as they adapt to his new physical capabilities. Overall, Hinata being as tall as Ushijima would bring about a major transformation in his role within the series.