Are you planing enscape for Archicad ?
We don't use Archicad in my office but I know a lot of people working with it.
They have only Artlantis to do image and I often hear the question "is there a good render engine ?" (understand : not Artlantis)
Again, I have no idea if Artlantis is bad or what, but it seams not satisfying for most of them.
Then, Enscape is not a proper render engine, but as it gets better and better, I can feel the potential.
And if I was Enscape team, I would bet that there is a good quantity of new customer there.
So, yes, make it up on your agenda !