Even if an MMA fighter recently attempted a Hadouken mid-fight, no-one could ever possibly say that Street Fighter represents the art of real fighting in any feasible way. But...
Jack Slack, probably the world's best martial arts analyst/writer, has written a great article linking some of Street Fighter's moves to actual moves used in mixed martial arts fights. You might be surprised how many fights have featured Street Fighter-esque moves.
It's a really interesting, GIF heavy article that made some cool connections I wasn't aware of. I knew that Sagat was based on real-life Thai Boxer Sagat Petchyindee, but I had no idea that Abel was somewhat modelled on Heavyweight all-time great Fedor Emelianenko. There you have it.
Well worth reading.