There are a few. I see more gaming than sports but that could mean nothing also because the sample size is so small. If you are grading a card you want to get the best price possible for when you sell it. Right now that is PSA. That's why it will be important for TAG to establish some level of market share in segments that matter. Baseball, Basketball and Football. Those sports move the needle in the US with prices. Hockey cards which are much more prevalent in the Canadian market won't really help them.
I'm a big believer in the technology but nobody is going to be breaking high value PSA slabbed cards (think 50K or more) to get it put in a TAG slab. So they are going to be in the market of newer cards. How fast they can turn around will also be key. The faster they can turn around cards means that new releases get on the secondary market faster than a PSA.