ULTRA Street Fighter IV: Will run above 60 FPS at 1280x720 if you turn the background detail to low, which means no backgrounds. If you use a lower resolution, you can turn it on high and it will run great. At 640x400, the game gave me a benchmark well above 60 fps and I could run the game with more settings on high. The lower resolution isn't so noticeable when you're playing. Looks 1000 times better than SSF4 on 3DS.
Skullgirls: Turn backgrounds to 2D and the game will run perfectly at 1280x720. Looks absolutely
gorgeous on the screen! Much, much better-looking than the Vita version and the load times are insanely fast. A standout game on the GPD WIN to me, so far.
I'm having trouble pulling off special moves consistently with the d-pad. Maybe it just needs to be broken in. But the good news is that the left analog nub works amazingly well. I usually detest using analog sticks to control fighters, but I had no trouble with this one. It almost reminds me of a NeoGeo CD pad, just without the clickiness.