I'm running the Rift in iRacing and that is on a laptop (i7 8750H, 1070 laptop GPU). I don't have everything maxed out, but with moderate settings I'm getting 90FPS no worries. I don't know about ACC or any other titles. For me VR was no brainer compared to buying 3 decent monitors. But there is no going back, I can't see myself ever choosing to race outside of VR.