Panasonic, Samsung, Sony and Xpand 3D have signaled their intentions to be part of a Full HD 3D glasses standard called M-3DI. The idea behind the initiative is to make 3D glasses interoperable. Samsung and Sony are relatively late additions to the group -- Panasonic and Xpand 3D announced their involvement months ago. Manufacturers have agreed to make their screens compatible with the new standard. In addition, the glasses will be backwards compatible with 2011 screens as well. Another technological improvement is the incorporation of a Bluetooth module, giving wearers greater freedom of movement. Will the standard help push active shutter 3D technology? Conspicuous by its absence from the consortium is LG. It's recently made the jump to passive 3D, which doesn't require the expensive active 3D glasses (they use the inexpensive type that's often seen in 3D movie theaters), which are less trouble for users (they don’t require a battery) and cheaper to produce. In the long run that might be where 3D television technology is headed. The first M-3DI glasses should hit the market in September 2011.