generally industrial robots do have very high positional accuracy.
if there is an error of even 0.1mm, the error accumulated over hundreds of thousands of repetitions of the same task would be unacceptable for any assembly line.
as you said, money is the big factor. with that, you could get very high resolution and guaranteed repeatability.
not sure how much the astelco systems mount costs, but from its specs, the unguided tracking accuracy is 1arc sec / 120 mins and 0.3 arc secs guided.
industrial robots would not be too far. all would depend on what industry it was designed for and what their acceptable tolerances were.
wonder why this video comes to mind
http://www.youtube.com/watch?v=wOCmoYU6h1Q
thats a classic
and this
http://www.youtube.com/watch?v=bxbjZ...eature=related