OLED is still impractically expensive for anything larger than a phone. You'd have to pay a small fortune for even a small TV sized one.
3D TVs are getting cheap if you look around. I saw a 42" one for $750 at Conn's during the weekend. 3D is still just a gimmick though, and will remain as such until more manufacturers switch to passive polarized 3D. The active type just costs far too much ($150/pair for the glasses last time I checked) and causes horrible eyestrain for some people (me included) as well as crosstalk ("ghosting") on LCDs due to the poor response times. Also, there is very little 3D programming available. Broadcasts are very rare and limited to high profile sporting events, and the 3D blu ray format is incredibly expensive and dominated by children's movies. I have a 3D computer monitor (the passive polarized type) and I have to say that the effect is definitely amazing, but only works in certain situations. For example, watching a nature documentary in 3D is beyond awesome. The scenes are almost always incredibly well shot and they usually make things look more realistic. However, sports and most non-animated movies gain nothing. People tend to look like cardboard cutouts and indoor scenes usually have either exaggerated depth or look squished.