The showcase shows that at least, we need a GTX1070 gpu to get a 30fps performance at 1080p. Will the steam deck run it well at 800p? Who can tell me that we can get how much boost from 1080p to 800p? As we know, the GPU in steam deck just equals to GTX 1050ti? what a pity!
It’s just a matter of wait and see.
At a guess, expect a 20 to 30FPS experience and if it’s better than that, be happily surprised.