Sales of luxury cars are growing faster than the overall market here in the U.S. -- and they're positively booming in places like China. Several automakers have already announced big investments in their luxury-car lineups, and now Nissan (NASDAQOTH:NSANY) says it will spruce up its Infiniti brand to join them.

In this video, contributor John Rosevear looks at the state (and importance) of the global luxury-car wars, and at whether Nissan's ambitious plans are likely to turn into big profits.

Motley Fool contributor John Rosevear owns shares of General Motors. Follow him on Twitter at @jrosevear. The Motley Fool recommends BMW and General Motors. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.