Yeah, I saw that earlier. Here is what I believe will be coming to the park for the Pixar expansion. The Monsters Inc. area was just recently greenlit for both DCA and DHS, so I don't believe this was a part of the original budget.
Monsters, Inc.
Streets of America will be transformed into a GIANT partially enclosed Monsters, Inc. factory (the building will feel like it is completely enclosed by it won't be it will most likely just be a roof). Guests can walk around the factory and meet monsters from the movies. The previous Muppet Vision theater will be taken over by Monsters Inc. Laugh Floor (moved over from the Magic Kingdom). A large area of the factory will be a inverted roller coaster (it will be a family coaster), themed to the doors from the movie. Possible plot line could be Randall returning to the factory and causing chaos.
Cars Land
Cars Land will consist of RSR, (which WILL NOT be a shorter version of the original. The track will be the same length, but the cars will be able to go up to 60 MPH on the race section. So it will be an improvement on the original ride) Maters Junkyard Jamboree, and a very unique food court/shopping area. This food court will be similar to the Simpsons one at USO, but will be EVEN MORE themed. You will go through a cave in the rock work for RSR, and will enter a warehouse that will contains a mini-sized version of Radiator Springs, an experience similar to the one at DCA, minus the Cozy Cone and Luigi's. The warehouse will be painted to appear that you entered RS at night. Mater's Junkyard Jamboree will be inside here as well. RSR will be located outside of the food court and entrance will be different. LMA and Backlot Tour will become RSR, and the Radiator Springs Experience will be inside the warehouse next to Toy Story Midway Mania.