Just got back from watching Titanic. People were as moved by the experience in much the same way as they were in the 90's when I watched it. Its a powerful movie and because it really happened almost 100 years to the day ago, quite an emotional one.
As for the 3D conversion, well it's certainly the best I have seen. Nothing looked bad, let's put it that way. Shots in the subs and looking down into the hole in the wreck where the stairscase used to be are quite stunning. You get a real sense of how far down it is.
Also shots from the very tip of the bow down or from the stern down to the ocean look really good too. Plenty of sense of height. The flying scene for example looks good.
Other shots don't work so well and are a bit flat. This is particularly true where backround objects are out of focus.
Overall though its a good effort and the shots that really do work well make up for the more subtle ones or the ones that don't work.
It's a good movie well worth watching in 3D on the big screen.