Yup.Just to clear the waters... there is NO chance of the new Muppet movie being CGI. Any and all rumors or quandaries of that should be immediately dispelled. Pixar is ONLY helping with the story element of the script, nothing else. Fear not!
To worry about such a thing is simply nonsense.
No offense to anyone, but judging from some of the worries about CGI here, I question if people have actually read the article.
"Some of the members of the so-called "Pixar Brain Trust" -- filmmakers John Lasseter, Brad Bird, Pete Docter, Andrew Stanton, Michael Arndt, Bob Peterson and president Ed Catmull -- were there for the consultations."
The article also referred to the movie as "live-action".
There are simply getting advice on the story, nothing more.
So as Prawncracker said, such worries should be dispelled. This is how bad rumors get started.