I'd be curious to hear what someone who is just visiting NYC would think of something like this. From my experience, once tourists enter a subway station, all bets are off in terms of orienting yourself. I feel like the little LED indicators in most stations at least in Manhattan with the line and time-to-arrival is really all you need.
Or, instead of investing in a virtual map, invest in better speakers in the actual trains themselves so that people can actually hear "now arriving at 14th St Union Square next stop Astor" instead of "now arcshcshcshcsh Uniocshcsh next cshop cshcshcsh"
Or, instead of investing in a virtual map, invest in better speakers in the actual trains themselves so that people can actually hear "now arriving at 14th St Union Square next stop Astor" instead of "now arcshcshcshcsh Uniocshcsh next cshop cshcshcsh"