Well I understand why you want it, yet I tend to disagree with that suggestion.
First off, it is true that the flood of game-threads is sickening to the eyes, yet an absence of "normal" threads plays a role in there as well. Since some of us already are worried about General Disscussion going downhill, I think sorting out the game threads to their own board would help. General Discussion will probably be left out, or more flooded with "favorite, best and vs. threads" than they already are, because people see that it hardly gets new posts. Beside that would an extra forum just for games lead to the point where even more games are started - since there is a special board for them.
I just did a count of game threads we have had in the past year. 24 threads are still openend, whereas about 15 are active. 50 have been closed, either due to the 20 page rule, or due to stupidity, rules or just because they were already existent.
Another point is that people have been fighting for an Off-topic game/music board for quite a long time, yet they have been told it would get too spammy and that the existing threads are enough.
Also, since we can see that some new members, as well as some older ones (*cough* KurtPikachu2001 *cough*) don't really know where to post. So I can imagine that the moderating work gets more as well.
Even though, some games need to require an IQ that even a slice of bread has, I wouldn't give them a board on their own. But these are just my opinions and as we all know, suggestions is all we can make.