I think you still have a wee hit of studying to do. Your info sounds like it's for PAL regions, and it was 576 lines, NTSC had 480. Of course NTSC was essentially 60Hz, and PAL was 50Hz, so you could say it balanced out a bit. There was also NTSC-J for Japan which was slightly lower still than NTSC.
That all said, none of that really has any bearing on what's being discussed, which is why I left it out. I could get into the history of TV, and how color TV was actually developed back in the 1920s, but those pesky two world wars sucked up a lot of the parts needed to manufacture color sets, then the idea was kind of forgotten about for a while. Doesn't have any real relevance to the topic, so why get into it?
The basic point is that the SNES came well before anyone had much more than a dream for HDTV, let alone any sort of support to implement it on a wide scale. Trying to use it on an HDTV set will not be without issues.