Cadillac XTS Platinum Concept

Cadillac may be calling the XTS a concept, but it's pretty clear that this is the sedan that will replace the STS and the DTS. Sporting a 3.6-liter V6 engine with direct injection and an electric motor, the XTS is said to have roughly 350 horsepower under the hood. Inside, there's a return to good old-fashioned Cadillac luxury, with features such as burled wood on the seats and synthetic suede accents marking the automaker's attempt at creating a "personal headquarters," from which the rich can conduct business when away from the office.