User blog comment:Blitzbear93/Dragonborn Question/@comment-3492791-20121125102855

Martin didn't turn into a dragon, mate. When he shattered the Amulet of Kings he released Akotosh's power from within it. He then channeled Akotosh himself, who choose the form of a dragon. Or at least that's what the game said happened.

So no, we won't be seeing dragonform anytime soon.