If you've ever been confused about which turn is which with top down navigation, then this is for you. While driving a car, being able to at a glance know exactly what turn is what would have saved me countless wrong turns, my parents probably doubly so.
One classic: there's a fork in the road on the way to my parents. One side is "straight", the other side is an exit. I took the wrong, exit side of that several times while my app said to go straight before I just knew the route and didn't need GPS at all. Top-down isn't as good in these cases because of densely packed roads and back to back exits.
That said, it's "good enough" and I doubt this takes off.
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."
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) ?