It will be interesting to see what the new Brazilian owners will make of Burger King's grandiose vision. Chidsey will step down as CEO, but will remain as a co-chairman along with Alex Behring, 3G's managing director. Supposedly they'll work together to find a new chief.

    So far, a few dozen outlets have taken part in the remodeling. While the revamped stores, according to the company, have boosted sales by 12% to 15%, 3G will be looking for ways to cut costs (as is the wont of PE shops) as well as cheaper ways to boost the top line. Of course, 3G has promised to invest big in the chain, but given that it's paying $4 billion, or $24 a share -- a 46% premium to its share price earlier this week -- the new owners will have to show much more care in deploying such investments than Burger King has during its four-year life as a public company.