In 1996 there was a short-lived TV show on MSNBC called "The Site." It was done live, and one of the stars was a CGI character who was animated in real-time based on the actions of the performer, Leo Laporte, in a mo-cap suit. Yeah, it didn't look great. But it was being done live, in real-time, over 20 years ago. If they could do that back then, I'm reasonably certain they could come up with a suitable CGI She-Hulk today, given the vast improvement of computer processing power in the decades since and the ability to do the rendering in post, rather than on-the-fly. After all, Dev Null was being done on a Silicon Graphix workstation, and even a 2013 Mac Pro would have qualified as a supercomputer in that era. I think if they can equal the quality of CLU in Tron: Legacy (which was 10 years ago now), then it'll be fine for TV.