From Popular Mechanics:
Microsoft has quietly been developing the first completely new computing platform since the PC — a project that was given the internal code name Milan. This past March, when the project was still operating on the down low, I became the first reporter invited inside these offices. My hosts politely threatened legal consequences if I blabbed about the project to anyone not directly involved in it, then escorted me down a dark hallway to a locked corner conference room. Inside that room was Microsoft’s best-kept technology secret in years … a coffee table.