Good point. But then why did it stop? Very few tabletop licences that don't already have PC-games from their 90's seem to be made, and only the Warhammer 40k licence seem to still be going strong. Even the most popular licence of the 90's, D&D, hardly gets any games these days.
Hm, now that's a good question. We could really use another good D&D game...
The words "turn-based" are probably dirty words among the big publishers nowadays. All we're getting are action-RPGs and the occasional RTS. Unfortunately, it is true that they sell much better - see anything on Morrowind vs Oblivion (and Morrowind wasn't even turn-based, it just wasn't much "action").
EDIT: Finished Portal
, now that I finally bought Portal 2. Time for that one.
Also finished the challenge levels. Not interested in timed challenges.
Games finished so far:
Vampire the Masquerade: Bloodlines, Darwinia, Dark Messiah of Might & Magic, Shadowgrounds, Braid, And Yet it Moves, Modern Warfare 2, Shank, Dead Space, Kane & Lynch 2, Modern Warfare 3, Rogue Trooper, Depths of Peril, Portal.