Update: Apparently Merson was looking at a preproduction unit, and there's no way to be sure how they'll stack up against the real deal.
Merson found a whole range of things to be troubled about in his time with the Sony: double-vision, color shift, relatively shallow depth. But the main issue—as Mark reported at this year's CES—is that LCD and OLED screens just aren't up to 3D. At least not in the way that plasma displays clearly are.
It's also worth mentioning that the HX800 Merson viewed is actually the lowest end 3D model Sony offers, and in fact is technically a "3D-ready" set, meaning that it uses a separate sync transmitter instead of the integrated 3D functionality of the LX900 series. We won't know how big, if any, a difference that makes until we're able to compare the two side by side. But for now, the early returns suggest that plasma's still the early king of 3D technology. [HD Guru]