I believe a model with the amount of Detail Rick.B is talking about is achievable but i doubt we will see any manufactures make them due to cost as some other members on this forum have stated in here.
If we see any locomotives with this level of detail made, it will be from someone scratch-building it with hand tools. and the reason i think it is possible is from seeing this photo of this aircraft built, and it was done by someone scratch-building with hand tools.but also as a side note with the modern stuff it is almost impossible to find any blueprints so one would have to do a ton of research and drawing up dimensions from photos and etc.
as for the traction control, not sure about that... what about little stepper motors used? they might have the torque to run a engine?