Can the 3D glasses provided with my Samsung 3D set be used at a friends house with a Panasonic 3D set?
Probably not. Though the operation of the glasses are similar there are likely differences between the glasses (IR signal, sync timing, etc.) that will likely cause issues with the “foreign” glasses. However, one manufacturer of shutter glasses (XpanD) has announced that they will be offering “Universal” 3D glasses that will automatically detect the 3D TV manufacturer and adjust to that set’s characteristics.