I think we can safely say at this point that Pixar has entered its Baroque period. When "Toy Story" came out in 1995, who would have guessed that within 15 years the company would be creating the richest, most resonant entertainments in Hollywood - on such subjects as culinary rats and a robot sentinel left in charge of a junkyard Earth? There is nothing, it seems, John Lasseter's house of soulful computer artisans can't do.
Which is why "Up" comes as a shock. Its ambitions are emotional and visual rather than thematic, but on the most basic level the new film is pure vaudeville: a loopy flyaway fantasy that's hysterically funny if only to keep the darkness at bay. It's a wonderful movie - fit for the whole family and for once I mean that as praise - but it doesn't seem designed for a higher purpose the way, say, "WALL-E" did. "Up" is a breather, a respite, a romp, but one with infinite shades of feeling.