writes:

Heard about the GPS ?

GPS was covered in some detail in the original 1998 thread. GPS just
isn't accurate or reliable enough for a lot of fast-moving objects in
a crowded space.

But if all GPSs are consistent in their error, then their relative
accuracy w.r.t. each other will serve.

But like others, I don't think aircars are practical for other
reasons. Anyway, why telecommuting isn't being promoted more is a
mystery to me...why not tax subsidies for cheap reliable bandwidth?
For development of large cheap screens? For....