A few years ago Alpine did a Volvo demo car with head up display that shows GPS nav info. It displays the map and driving instructions right on the windshield right above the hood line. It was really impressive.
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Thats what I mean. either have a shaped needle that runs round the back, and upto the edge of the TFT, or have a V thin TFT that sits infront, but if it was too thick would stand out like a sore thumb.
If you look carefully, you can see an opening in the overhang above the display. I haven't seen this before, and I can't really tell how thick that overhang is, but do you suppose it's some kind of projection from above onto a small screen?