ASS-P wrote:
...A thought...It has been considerably more years since the 1978 version than had passed between 1956 and '78 but I guess the '78 one looks more " modern " than the '56 version did in the 70s ~ For one thing , of course , there's the disappearance of black and white movies but I think , too , that " looks " , in general , changed lots more between '56 and the 70s than between then & now !

Huh, I've never thought about it, but I think you're right about that. Interesting, especially since the 70's had its fair share of trends that stood out.
Yes, I have read the original Jack Finney novel, but I have no idea if there is more than one version of it plot wise. It was a captivating read, but it's been some years since I read it. I also don't know how well it was translated (since I read the Norwegian translation of it).