Titanic: the first dvd (from 1999) was a 4/3 master, but i was surprised to see the quality of the picture despite being non-anamorphic and the fact that the movie (3hrs!) was on a single disc; if the OOT dvds can match that quality i will consider myself happy.
The Abyss: (probably the best Cameron movie ever!) it is also a 4/3 mastered dvd, but here you can tell that it is a LD master transfer; the picture is really blurry (specially when there is high contrasts in the image, like the openning sequence in the USS Montana), it's a shame that this movie never had a 16/9 release on dvd!
Silent Running: the quality is good enough to be "watchable" even if it is a typical 70's kind of image (grainy)
2010: the picture quality is ok, the lack of sharpness doesn't affect very much the space and interior scenes.
Wargames: this dvd has all the defaults! no sharpness, blurry and grainy picture.