Pretty much just what the title says. I've been listening sequentially through the Three Moves Ahead archive and hit the show from late '09 about SI. I remember thinking how great this game looked at the time, and how much I generally like Vic Davis games, but thinking that perhaps it was simply impossible to create an interesting and competitive AI for a game like this. To be honest, I still suspect that's true, but I'm curious if Vic's made any headway in the intervening years towards making this an interesting single player experience.
And yes, before anyone says it I'm fully aware that RPS has a game of this going now and again. If I did get it, I might even play such a thing once or twice, but one or two MP games is not remotely justification for buying a strategy game to my mind. There's got to be some single player heft IMO or there's ultimately no point.
Edit: An alternate way to frame this might be: which is presently the better single player game, SI or Dominions 3?