I am looking for the perfect windshield sticker like mad. I do have different tints to play with, but have not applied any one yet. I'll take a look to these cars over internet to see how they work and then go for one in the YJ.
I guess if you tilt the LCD you can easily change the zone where the image is projected. Due to the curves of the windshield it is possible you get the image slightly distorted, but the numbers projected can be distorted also, and get them corrected by the windshield (through some trial and error experiments)