Film resolution is significantly higher than any current video format, so the better the video formats get the more detail will be seen from an original film master, even if the film is 70 years old.
That said, I don't think most people really care to get more detail from thier movies at home. It's all about the money. Beta was better than VHS, but VHS won that format war because it was cheaper.
DVD is the current defatco video format, and will be for a long time, until you have dollar blue ray bins at Wal Mart.