Slumdog Millionaire is amazing. It really is.. but it has its fair share of flaws. The acting of the adults is mediocre, it becomes too melodramatic and cliché towards the end, and some of the characters are very poorly developed (see adult Latika, who's nothing but an ideal and a plot device). But it more than makes up for these shortcomings in sheer kinetic energy and visual excitement. It has a lot of heart.
Also. Kung Fu Panda shouldn't even deserve to be mentioned with the Pixar films. Sure, it's entertaining and well animated, but it ends there. There's nothing in the movie which elevates it past a generic kids animated movie. That's what separates Pixar from Dreamworks.. A movie like Ratatouille transcends the kids animation genre, whereas Kung Fu Panda barely does anything original.