The sun, the sky, and the moonroof
This Thunderbird-based concept car made its public debut at this year's Detroit auto show and blurs the boundaries that define a convertible. It features a retractable hardtop that, when closed, replicates a coupe with glass skylight. Fully closed, it's the latter. Press a button, and the retractable aspect comes into play, and the result is a slick roadster with no top stack showing.