I'm really not sure how accurate this super enhanced preview will be in max. It can be handy for some animation preview maybe, but I don't think it will be accurate enough to setting transparency, refraction, global illumination, displacement map, sss, fur, and the other fancy effects.

There are some other tools much better for this job, like the modo realtime preview, fprime for lightwave, it looks like even v-ray is comming with something similar. It's not really realtime, a little bit grainy, but much more handy to setuping a scene and have an accurate feedback. That's having said I might be wrong, maybe this max10 viewport preview is less eye-candy that I though.