But it's all part of the show. Big Thunder Mountain, Space Mt, or Rock'n'Roller wouldn't be quite as convincing with generic coaster cars. It all adds to the overall effect.
I don't know how Toy Story Land will fare in overall effect. The concept art didn't look too convincing to me, but then I saw the higher res version and I see the potential for a nicely themed little area that will serve its purpose very nicely. It's kind of hard to judge without seeing the finished product in-person, from ground level, or at least having more photo-realistic artwork available.