Like many have already stated I'm a little concerned about this as well. First, yes, congrats to Mike, he did a lot for the hobby. We all need a break and can't work ourselves into the grave.
From a consumer point of view who has the majority of his layout from MTH I'm really worried about support down the road. I run the tinplate traditions/Lionel Corp pieces with DCS. So I have very limited choices if things fall apart in the next few years.
A company like Dallee might do very well if they can get the rights to DCS.