Jaguar's striking C-X17 crossover is just a concept now, but it could get built soon. Photo credit: Jaguar.

It's arguably the hottest segment in the auto business: "Crossovers," those SUV-like vehicles built on car-like platforms, have become a global craze. From tiny, inexpensive entries like Ford's (NYSE: F) EcoSport to luxurious and expensive entries from Porsche and others, crossovers are huge business right now.

Mercedes-Benz showed off a concept crossover called the GLA this week. Photo credit: Mercedes-Benz.

The auto show season kicked off this week in Frankfurt, Germany, and as Fool contributor John Rosevear explains in this video, SUVs and crossovers were the big theme -- as nearly every automaker seemed to have new entries on the way.

The Lexus LF-NX is the Toyota brand's entry into the white-hot premium compact crossover space. Photo credit: Lexus.

Fool contributor John Rosevear owns shares of Ford. The Motley Fool recommends BMW and Ford. The Motley Fool owns shares of Ford. 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.