Here on VGChartz I once stated I may wait with buying a new 3DTV until when there would be no requirement for additional glasses (I currently own a 1080p Philips HDTV). Some were sceptical this was at all possible. Since then of course Nintendo anounced its 3Ds (which uses a slider to adjust for different distance between both eyes).
Toshiba and Sony are now demonstrating their glasses-free 3DTVs at CES 2011:
http://www.youtube.com/watch?v=H09494K_a2Q
With regard to the 3D headset prototype, the reporter here stated it was the most impressive piece of tech they got to see at CES 2011 so far:
http://www.youtube.com/watch?v=ity-zjvB9p4