Wouldn't be surprised if a few manufacturers bring out some kind of "black box" that allows a standard large screen to view some kind of pseudo 3D, albeit with a slightly reduced resolution as compared with a dedicated 3D screen.
I wonder how feasible this would be? If you had a box that takes in the hdmi 1.4, 3d signal, then, spits out say, a 720p or 1080p signal, at 50 or 60hz. Alternate the left and right image, put in some ir leds to synchronise glasses. You would probably need to have the facility to adjust the timing of the leds to a small extent to allow for delays in displaying the picture.
You would also have to turn off any 100 / 120 / 200hz etc settings in the tv, but, does this sound feasible?
If 24p is smooth enough to watch, each eye getting 25 / 30 images a sec should be ok as well.
Would be happy to pay a few hundred dollars for something like this, otherwise, no 3d for us.
I don't think the major manufactures would initially provide something like this (rather sell a new tv than a converter box), but, this would be quite handy.