There's really no point to opinions supported by guessometrics only on this: the risk/benefit calculation of such a system can be figured out to a few figures after the comma, and both Lufthansa and an airport like Frankfurt or Amsterdam have enough ops engineers and smart bean-counters to figure it out.
Just to contradict myself, I'll take a wild guess that only the very bigges airports with habitual taxi congestion would benefit from a system like this, and in that connection it would be interesting to know if the taxibot is usable in adverse weather, i.e. taxiways that are iced, flooded or covered in snow..