Definitely an E92 M3 CSL prototype. You can see a few visual styling difference from "normal" M3 such as: carbon fiber roof, different (more agressive) front and rear bumper fascias, different trunk lid etc. I don't think that's just an add-on spoiler but a whole integrated deck lid (like the previous CSL). Special, light-weight 19" wheels will surface soon as well. It will be a beast of a car. Let's just hope BMW will import it over here.

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Dinan S1 pkg / 22" Iforged Swift - Toyo 295F*315R / Eisenmann Race - OEM tips / H & R 15mm front
30mm rear spacers / Euro-spec headlights / CF M Competition steering wheel / Full CF interior /
6000K D2S / HID fogs / AiBrights V3 / Interior Xenon / LED sidemarkers / Matte black grille & hood vents