Half of all Caribous are changing to Peet's, the other half are closing permanently. Going to be honest, considering how low-traffic that area is I wouldn't be surprised this Caribou closes (which is sad).
You're right anon - this location is remaining open as a Peet's, changing over sometime later this year.
I spoke to the staff there tonight. There won't be any staff changes, just a re-branding. The article was misleading - only one Caribou in the city of Chicago is closing permanently (most closures are in the burbs).