while I think that the widgets telling you which lane to put yourself in largely solve this kind of intersection confusion, I understand the problem you are describing

but this seems to me just a topdown and "third person" at the same time through the distortion, I don't see how it helps with knowing exactly where to turn, is it because it shows the way further down the turn (like, sideways after the turn in the demo) ?

For me, confusion in top-down navigation happens either because there's no bitmapped imagery being displayed, forcing me to guess where the turn is by mentally wrapping vague 2D geometry over the scene viewed through my windshield, or because the trace isn't drawn precisely enough over the imagery that is available.

I don't see much added value with this particular nausea-inducing approach. It falls into the category of "You should've thought less about whether you could and more about whether you should."