Scatter terrain is a very important part in any game. As I see it, it's a great immersion factor. If you are not going to have a table that makes at least a bit of sense geographically or that it appears to be a little bit lived in, then why bother having beautifully painted miniatures? If the terrain is going to be all 2D then you might as well use abstracted pieces for units, like TEG or Risk.
At the end of last year I set myself the goal of not starting any big project, like a new building or platoon, until I had finished a selection of scatter terrain that had been in the to do list for a while. I achieved my objective some time before years end, but it took some time for me to post the finished results.