Warm weather is imminent, fueling a desire to shed winter coats for something lighter. In recent years, the hoodie has been the dominant choice, but a new, more stylish top piece is making its presence felt this season: the poncho (and its more formal sibling, the cape). This cozy Red Riding Hood poncho with its dramatic flare (California-fleece cape, $65 at American Apparel, 121 Spring St., at Greene St.; 212-226-4880) is but one of many versions now in stores from the Gap to Steven Alan to Burberry.