Sometime in the past few weeks they've begun airing Tekken 6 tournaments on MBC Game, one of Korea's largest video game channels. Taking a break from it's usual Starcraft marathon, MCB Game has been showing Tekken 6 Crash battles more than anything else the last several days. Small teams of 4 face off against each other 1v1 at a time (obviously) I can't find any information about prizes in English, but I'm guessing everyone competing at least gets to hold onto the cool Tekken 6 jackets they all are wearing....and a photo with the booth babe looking models to show off to their geeky friends at their local PC Room.
I have not seen Tekken 6 in any arcades around where I live, though I live outside of Seoul. My wife who's Korean tells me that Tekken is the most popular fighter in Korea (Likely because of Korean characters like Hwoarang), which explains why SFIV isn't getting any air time on TV. I personally can't get into the silly looking characters in Tekken. Regardless, every time I play SFIV on XBL some Korean mops the floor with me.