There have been several good threads recently about the pent-up demand for a better 3 rail track system for those who want more 'realism' in the direction of a lower profile and scale ties with proper spacing.
The two candidates are Atlas and ScaleTrax. Both have issues and attributes.
To achieve a more mainline prototypical tie spacing ScaleTrax would have to be entirely re-tooled (probably not going to happen)
Atlas on the other hand might be able to replace their vastly oversized rails for a smaller, lower profile set (from their 2 rail track?) with the center rail smaller still using the existing tie system. Picture MTH's rails on Atlas ties.
ScaleTrax uses an inverted 'T' for their center rail which is quite successful (with NO excessive roller wear). Imagine if Atlas did the same. NOW we would truly have a great looking 3 rail system.
Yes, we still have the third rail 'ruining' the scale appearance but like many of you, I've come be in denial about the third rail - sometimes 2 rail track looks odd to me! 
Actually, when photographing our models, we often shoot from a low enough level which can easily hide the center rail. Rich Battista posted some photos of his layout awhile back where he photoshopped out the middle rail and the resulting images were amazing - very realistic!
A couple of fellas here on the Forum are working on using Atlas 2 rail track with a smaller center rail mounted which shows great promise. Hopefully they will share their progress with us soon.
Someone joked about MTH missing being "The King of the 3 Rail track systems". So did Atlas. But this could always change...
Here are some shots taken at track level that hides the 'offending rail' easily. Also notice how the low profile of the rail here (ScaleTrax) gives the locomotives a more massive appearance which is the illusion we are after is it not?
