Early on it appeared XpanD
owned the active shutter glasses market until Samsung, Sony
, Panasonic and Toshiba
all announced they'd use RealD's active shutter glasses instead. In fact the only deal XpanD announced during CES was with Vizio
who was using the Bluetooth variety with its 3D HDTVs. Although not official, we'd be willing to bet these are the very same glasses that'll be included in the in the "3D upgrade pack" for the Philips HDTVs that are 3D ready.
Not sure why some TV manufactures choose one brand over another, but as soon as these make it into reviewer's hands we'll find out.