I'm not exactly knowledgeable about display formats, but wasn't there an "in-between"
resolution that was better than SD but not quite full-HD?
There was 480i, then 720p, and 1080i, and then finally 1080P. So anything made with resolutions other than 480i but not quite 1080p would still be considered HiDEF but not necessarily true HD. Or is there some other meaning to those words?
From a broadcast standpoint, not that I'm aware of. DVD can be up to 720x576, but I wouldn't really consider that "high-def". Certainly, something could be produced in some in-between resolution and only broadcast in 480i or something, but I have no idea if that's actually happened or not.