Some nice information I just got from someone who works at Stern, won't mention names:
Asked about the left outlane that has bare wood showing, where the art stops. This is because the screen printer has margins they must stick with, and the art needed to cut off there. Didn't sound like there were plans to cover this area with a plastic, but not totally ruled out - which brings me to my next question I asked...
I asked what happened with the possible "streams crossing" function and if that has anything to do with the black plugs on the lower play field. He said that this was for a potential accessory upgrade down the line that would use these plugs. I then asked if that could be the reason for the bare wood over on the left and he said its possible, but if it comes to market when the "programming becomes available for it" then theres a good chance it will utilize that spot.
Just wanted to pass this on, and now it seems the Cross Streams may have required extra R&D with the mechanics and programming aspect, so it may possibly be sold as an accessory later on.