Ah yeah...but she represents Hope, in a world that Homura says is starting to darken again...which is why Homura is fighting so hard to protect it and everyone else is losing their grip on her presence. There might be an indication that if this world falls to despair again that Tatsuya will forget about her when he grows up. Then again, what little memories anyone who knew Madoka has anymore are merely very blurry nostalgic images buried deep in their conscience...if any at all anymore. :/