Actually, her cape will block his view. I'd say he is jealous of the cape. He's going all "So what if her cape has those matching colours and that smooth silk design, mine can survive explosions, bullets, rocket launchers, Darkside's Omega Beams and Dick's awful puns! It's all about the practicality!The Practicality! Hmm..note to self, schedule a training course for Tim tonight on the importance of helmets and tell Alfred to bring a bucket of bricks and a camera."