Last year’s CES was 3D TV’s great big debutant ball. The world was shown something kind of cool-looking and told, This is the future of home entertainment! Behold! Everyone oohed and aahed appropriately, then went out and bought tablets. It’s OK that 3D TVs still aren’t exactly commonplace in the typical American living room. They’re expensive, there’s still relatively little 3D content, and you have to spring for a special pair of glasses for everyone in the room. And replacing a large TV for any reason can be kind of a pain.