CGI has made some great strides in the past few years! The short called Piper, which accompanied Finding Dory in theaters, is a work of art from Pixar.
Piper is a baby sandpiper learning to take care of himself. His mother is so proud. And he's just so cute you can't help but love him. Then after you've watched the story, you realize that the water was so realistic, you didn't even think about it being computer-generated! -via Geeks Are Sexy