BMW's compact roadster has been out of production for over a year and hasn't seen a redesign since 2009. The new BMW Z4 Concept changes that. It diverts noticeably from the arguably feminine lines of its predecessors, replacing them with sharp edges that lend the car a wedge-like shape. It still holds the same long wheelbase, low-slung silhouette, and compact rear as classic roadsters, albeit accented with aggressive, vertical takes on the company's four-eyed headlights, a slanted kidney grille, and elongated L-shaped rear lights. Inside you'll find a driver-focused cabin with black surfaces denoting the cockpit, while the passenger area is clad in an orange that reflects the Energetic Orange frozen exterior paint. Unlike most concepts, this design study is set to appear in production-ready form sometime in the next year.