It's hard to explain, but it just feels like isolated areas to me and not one continuous location. For comparison, the original Blood Omen game was isometric with separate screens too, but everything felt connected in it because each screen was directly connected to the screens around it, so I don't think it's just the view point that makes me feel this way.
It's more like BG has the points of interest as self-contained areas and then it has some random "travel" squares in between. If they didn't have ideas for more locations then it's better they handled it this way (I hated the sense of "filler" for much of Oblivion and Fallout 3 where there were large open areas without anything to do). I just don't consider that to be open world, and since the press release mentioned no loading times I don't think it's what Witcher 3 and Cyberpunk will do.
Exactly! That's why the idea is so exciting An actual open-world RPG with a real in-depth story that lets the player make important decisions. I've never played a game like that before, and of the games I've heard of but haven't played yet I think only Fallout: New Vegas might live up to that (I intend to play it sooner or later). Either way, I think CDPR will accomplish something new and interesting that hasn't been done before.