We hope you're not too attached to that 20-inch DX2000 you got from LG back in July. (You did rush out and buy one, right?) 'Cause the Korean manufacturer has just updated its line of eye-tracking, glasses-free 3D displays with the 25-inch DX2500! Just like its smaller sibling, the DX2500 has a parallax barrier over the screen and an embedded camera for tracking head and eye movement. As a pe